The shape of the resultant matrix of the multiplication of a "2 by 4" matrix and a "4 by 3" matrix will be a "2 by 3" matrix, the correct option is (d).
We know that the general rule for matrix multiplication, which is If matrix A is "m by n" matrix (it has m rows and n columns) and the matrix B is "n by k" matrix (it has n rows and k columns),
Then the product AB is an "m by k" matrix, which means, that the resulting matrix will have "m" rows and "k" columns.
In this case, the "2 by 4" matrix means that matrix has 2-rows and 4-columns, and
The "4 by 3" matrix means the matrix has 4-rows and 3-columns.
Since the number of columns in the first matrix (4) matches the number of rows in the second matrix (4), we can perform the multiplication.
The resulting matrix will have 2 rows and 3 columns,
Therefore, the shape of the resultant matrix is (d) 2 by 3.
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The given question is incomplete, the complete question is
Please identify from the following choices which has the shape of the resultant matrix of multiplication of a "2 by 4" and "4 by 3" matrices.
(a) 3 by 2
(b) 2 by 4
(c) 4 by 4
(d) 2 by 3
1. Linda says the two expressions (12x+16) - 6x and -4(x + 2) are equivalent
Is she correct Explain how you know by showing your work.
please help to find the area of this figure
Answer:
42 units^2
Step-by-step explanation:
central rectangle area
(A=LxW)
7x4=28 units^2,
congruent triangle area
(1/2bxh)
1/2( 7x2)= 7 units^2. (one triangle)
let's add the 3 areas 28 + 7 + 7 = 42 units^2 (your answer)
Please help!!!
Does anyone know how to write the “In” symbol in mathXL ?? It would help so much if someone could tell me, thanks so much !!
The simplified value of 3㏑3 is 3.296
Define the term logarithm?An exponent or power to which a given base number must be increased in order to arrive at a certain value is provided by a logarithm, which is a mathematical function.
With a single natural logarithm, the given expression is;
⇒ 3㏑3
we can write it as,
⇒ ㏑ 3³
⇒ ㏑ 27
⇒ 3.2958
Therefor, simplified value of 3㏑3 is 3.296.
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The simplified value of the logarithmic term 3㏑3 is 3.296. Simple logarithm is nothing more than log in base 10.
What exactly is a logarithm?A logarithm is a mathematical function that specifies the exponent or power to which a given base number must be raised in order to reach a particular value.
Exponent and logarithm are inverses of one another. Logarithm with base e is what is also known as a natural logarithm. Simple logarithm is nothing more than log in base 10.
The provided expression is with a single natural logarithm:
⇒ 3㏑3
we can write it as,
⇒ ㏑ 3³
⇒ ㏑ 27
⇒ 3.2958
Therefore, simplified value of 3㏑3 is 3.296.
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Let V and W be vector spaces and T: v → w be linear. (a) Prove that T is one-to-one if and only if T carries linearly inde- pendent subsets of V onto linearly independent subsets of W. (b) Suppose that T is one-to-one and that S is a subset of V. Prove that S is linearly independent if and only if T(S) is linearly inde- pendent. Suppose β and onto. Prove that T(3) = {T(m), T(v2), for W (c) (vi, v2 , . . . , Un} is a basis for V and T is one-to-one ,T(vn)} is a basis
(a) T is one-to-one if and only if T carries linearly independent subsets of V onto linearly independent subsets of W.
(b) If T is one-to-one, then S is linearly independent if and only if T(S) is linearly independent.
(c) If β is a basis for V and T is one-to-one and onto, then T(β) is a basis for W.
(a) Assume T is one-to-one. Let S be a linearly independent subset of V, and suppose T(S) is linearly dependent. Then there exist distinct vectors s1, s2, ..., sn in S such that T(s1), T(s2), ..., T(sn) are linearly dependent. This means that there exist scalars c1, c2, ..., cn, not all zero, such that c1T(s1) + c2T(s2) + ... + cnT(sn) = 0. Since T is linear, we have T(c1s1 + c2s2 + ... + cnsn) = 0. But since T is one-to-one, this implies that c1s1 + c2s2 + ... + cnsn = 0, contradicting the assumption that S is linearly independent. Hence, T(S) must be linearly independent.
Conversely, assume that T carries linearly independent subsets of V onto linearly independent subsets of W. Let v1 and v2 be distinct vectors in V, and suppose T(v1) = T(v2). Then {v1, v2} is linearly dependent, which implies that there exist scalars c1 and c2, not both zero, such that c1v1 + c2v2 = 0. Applying T to both sides yields c1T(v1) + c2T(v2) = 0, which implies that T(v1) and T(v2) are linearly dependent. This contradicts the assumption that T carries linearly independent subsets of V onto linearly independent subsets of W. Hence, T must be one-to-one.
(b) Assume T is one-to-one and let S be a subset of V. Suppose S is linearly independent and that T(S) is linearly dependent. Then there exist distinct vectors s1, s2, ..., sn in S such that T(s1), T(s2), ..., T(sn) are linearly dependent. This means that there exist scalars c1, c2, ..., cn, not all zero, such that c1T(s1) + c2T(s2) + ... + cnT(sn) = 0. Since T is linear, we have T(c1s1 + c2s2 + ... + cnsn) = 0. But since T is one-to-one, this implies that c1s1 + c2s2 + ... + cnsn = 0, contradicting the assumption that S is linearly independent. Hence, T(S) must be linearly independent.
Conversely, assume that T(S) is linearly independent whenever S is a linearly independent subset of V. Let v1 and v2 be distinct vectors in V, and suppose T(v1) = T(v2). Then {v1, v2} is linearly dependent, which implies that there exist scalars c1 and c2, not both zero, such that c1v1 + c2v2 = 0. Since {v1, v2} is linearly dependent, we have either v1 = 0 or v2 = 0. Without loss of generality, assume v1 = 0. Then T(v1) = 0 = T(v2), and hence T({v1, v2}) = {0} is linearly dependent. This contradicts the assumption that T carries linearly independent subsets of V onto linearly independent subsets of W. Hence, S must be linearly independent.
(c) First, we will show that T(β) spans W. Let w be an arbitrary vector in W. Since T is onto, there exists some vector v in V such that T(v) = w. Since β is a basis for V, there exist scalars c1, c2, ..., cn such that v = c1v1 + c2v2 + ... + cnvn. Applying T to both sides, we have w = T(v) = T(c1v1 + c2v2 + ... + cnvn) = c1T(v1) + c2T(v2) + ... + cnT(vn), which implies that T(β) spans W.
Next, we will show that T(β) is linearly independent. Suppose there exist scalars c1, c2, ..., cn such that c1T(v1) + c2T(v2) + ... + cnT(vn) = 0. Applying T to both sides, we have T(c1v1 + c2v2 + ... + cnvn) = 0. But since T is one-to-one, this implies that c1v1 + c2v2 + ... + cnvn = 0, which implies that c1 = c2 = ... = cn = 0, since β is a basis for V. Hence, T(β) is linearly independent.
Since T(β) spans W and is linearly independent, it is a basis for W. Therefore, if β is a basis for V and T is one-to-one and onto, then T(β) is a basis for W.
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PLEASEE HELP ITS DUE TONIGHT!!
Given the two rectangles below. Find the area of the shaded region.
If the average aggregate inventory value is $1,200,000 and the cost of goods sold is $600,000, which of the following is weeks of supply?
The inventory turnover ratio can be calculated by dividing the cost of goods sold by the average inventory value. In this case, the inventory turnover ratio is 0.5, and the correct answer is (D) 0.5.
The inventory turnover ratio measures the number of times a company sells and replaces its inventory during a period. It can be calculated by dividing the cost of goods sold by the average inventory value.
The inventory turnover ratio = Cost of goods sold / Average inventory value
In this case, the cost of goods sold is $600,000 and the average inventory value is $1,200,000.
Inventory turnover ratio = $600,000 / $1,200,000 = 0.5
Therefore, the inventory turnover ratio is 0.5, and the correct answer is (D) 0.5.
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Complete question:
If the average aggregate inventory value is $1,200,000 and the cost of goods sold is $600,000, which of the following is inventory turnover?
A)60
B)10.4
C)2
D)0.5
E)None of these
You are given the following information about a termite colony population….
The population of the termite colony will be approximately 593 in 4 years.
Since the population of the termite colony will double in 6 years, we can use the formula:
P = P0 * 2^(t/k)
where P0 is the initial population, P is the population after time t, and k is the time it takes for the population to double (in this case, 6 years).
We know that the current population is 16000, so P0 = 16000. We also know that the population consists only of females, so we can assume that the population grows linearly.
To find the population of the termite colony in 4 years, we need to determine how much the population grows in that time. Since the population doubles in 6 years, we can assume that it grows by a factor of 2/6 per year. Therefore, the population after 4 years can be calculated as:
P = P0 * (2/6)^4
= 16000 * (1/27)
= 592.59 (rounded to the nearest whole number)
Therefore, the population of the termite colony will be approximately 593 in 4 years.
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Which statement about equations with an infinite number of solutions is TRUE? No matter what number you choose to substitute for the variable, the result will be a true statement. No matter what number you choose to substitute for the variable, the result will always be 0=1 . No matter what number you choose to substitute for the variable, the result will always be u=0 . No matter what number you choose to substitute for the variable, the result will be a false statement.
Correct Option is No matter what number you choose to substitute for the variable, the result will be a true statement.
What are Infinite Solutions?The number of solutions of an equation based on the total number of variables contained in it. As a result, the equation system consists of two or more equations with two or more variables.
It can be any combination such as
2 equations in 3 variables5 equations in 3 variables, etcThere are three different forms of equation solutions, depending on the quantity of variables and equations. They are
Unique Solution (One solution)No solutionInfinite Solutions (Many solutions)The term “infinite” represents limitless or unboundedness.
For the infinite number of solution of the equation No matter what number you choose to substitute for the variable, the result will be a true statement.
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PLEASE HELP!!! Select one of the Theorems from section 2.2 and do the following:
1. Explain why you chose to explore that theorem. (2 points)
2. Write down the formal definition of the theorem. (2 points)
3. Explain the theorem in your own words. (2 points)
4. Find or create an example with new numbers (don't copy the ones already on the slides) and explain how/why it works. (4 points)
"You can do this several ways: (A) Include an image(screenshot) of your work. (B) Type the example in your reply or (C) Insert a video
(self made or you tube)
5. Teach this theorem to someone in your family or a friend and let me know what their reaction was (what did they say?). (2 points)
You're welcome to read another student's posting and give them some positive feedback - be encouraging :)
Here are the 4 Theorems you can choose from:
1. Angle Sum Theorem
2. Third Angle Theorem
3. Exterior Angle Theorem
4. Corollary of Exterior Angle Theorem
I chose to explore the Angle Sum Theorem because it is a fundamental theorem in geometry, and it has important implications for many geometric proofs and applications. Moreover, the theorem can be easily visualized and understood, making it a great starting point for learning geometry.
What is the theorem about?The formal definition of the Angle Sum Theorem is: "In any triangle, the sum of the interior angles is equal to 180 degrees."
In simpler terms, the Angle Sum Theorem states that if you add up all the angles inside a triangle, you will always get a total of 180 degrees. This means that no matter how you move the sides of the triangle or what shape it takes, the total measure of the angles will always be the same.
Let's consider a triangle with angles of 30 degrees, 60 degrees, and 90 degrees. According to the Angle Sum Theorem, the sum of the interior angles of any triangle must be 180 degrees.
So, in this case, we have:
30 degrees + 60 degrees + 90 degrees = 180 degrees
Therefore, the Angle Sum Theorem holds true for this example.
I taught the Angle Sum Theorem to my younger brother, and he was fascinated by it. He said that he had never thought about triangles in this way and found it cool that the angles always added up to the same number, no matter what the triangle looked like. He then went on to ask me more questions about triangles and geometry, which I was happy to answer.
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Find the volume of the composite solid. Round your answer to the nearest tenth.
Answer:
5188.8 [cm³].
Step-by-step explanation:
1) V=V[1]+V[2], where V[1] - the volume of the cube with length of its side 10 [cm], V[2] - the volume of the sphere with radius 10 [cm].
[tex]2) \ V=10^3+\frac{4}{3} \pi*10^3=5.188790*1000=5188.8 \ [cm^3][/tex]
what is the formula for the z statistic? (recall that m is the same as x-bar) (and that sem is the same things as sigma with a m subscript)
The formula for the z-statistic is (x - μ) / (σm) or (x - μ) / (s/√n) depending on known or unknown population standard deviation.
The formula for the z-statistic, which is used in hypothesis testing for a sample mean when the population standard deviation is known, is:
z = (x - μ) / (σm)
where x is the sample mean, μ is the population mean, and σm is the standard error of the mean (SEM), which is the standard deviation of the sampling distribution of the mean.
Alternatively, we can use the estimated standard error of the mean (s/√n) when the population standard deviation is unknown, and the formula for the z-statistic becomes:
z = (x - μ) / (s/√n)
where s is the sample standard deviation and n is the sample size.
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Work out the bearing of D from C.
The bearing of point D from C as required to be determined in the task content is; 315°.
What is the bearing of point D from C?By definition, the bearing of a point is the number of degrees in the angle measured in a clockwise direction from the north line to the line joining the centre of the compass with the point. A bearing is characteristically used to represent the direction of one point relative to another point.
The bearing of the point D from C in this case where the angle motion is clockwise starting from the north pole by convention;
The bearing of D from C is; 360 - 45 = 315°.
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The windows to a Tudor-style home create many types of quadrilaterals. Use the picture of the window below to answer the following questions.
HELP PLS
a. Determine which type of quadrilaterals you see. Name these quadrilaterals using the labeled vertices.
b. What properties of quadrilaterals would you have to know to identify the parallelograms in the picture? Be specific as to each type of parallelogram by using the properties between sides, angles, or diagonals for each.
The types of quadrilateral are: Rectangle HAEG, ABFE. Trapezium GCDK. b. The properties of quadrilateral required to identify parallelograms are corresponding sides and angles are equal.
What are quadrilaterals?A closed shape called a quadrilateral is created by connecting four points, any three of which cannot be collinear. A quadrilateral is a polygon with four sides, four angles, and four vertices, to put it simply. The Latin term "quadra" (which means four) and "Latus" (which means sides) are the roots of the English word "quadrilateral." It should be noted that a quadrilateral's four sides could or might not be equal to one another. There are several kinds of quadrilaterals, and each one is distinguished from the others by its own special characteristics.
The types of quadrilateral in the given window are:
Rectangle HAEG, ABFE.
Trapezium GCDK
Triangle COD, LEF.
The properties of quadrilateral required to identify parallelograms are corresponding sides and angles are equal.
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1 On a map of scale 1:100 000, the distance between Tower Bridge
and Hammersmith Bridge is 12.3 cm.
What is the actual distance in km?
To calculate the actual distance in km, we need to use the scale factor of 1:100 000. This means that 1 cm on the map is equivalent to 100 000 cm in real life.
Therefore, 12.3 cm on the map is equivalent to 12.3 x 100 000 cm in real life.
Now, 1 km is equivalent to 100 000 cm.
Therefore, 12.3 x 100 000 cm is equivalent to 1.23 km.
Hence, the actual distance in km is 1.23 km.
the zeros of f(x)=20x^2 - 19x + 3
The quadratic function's zeros are therefore [tex]x = 1[/tex] and [tex]x = 0.2[/tex] . A degree two polynomial in one or so more variables that is a quadratic function.
What ways in which quadratic function be recognized?Three points are used to determine a quadratic function, which has the form [tex]f(x) = ax2 Plus bx + c.[/tex]
[tex]Sqrt(b2 - 4ac) = [-b sqrt(b)][/tex] Where the quadratic function's coefficients are a, b, and c.
Here, [tex]a = 20[/tex] , [tex]b = -19[/tex] , & [tex]c = 3[/tex] . We obtain the quadratic formula by substituting these values: [tex]x = [-(-19) sqrt((-19)2 - 4(20)(3)] / 2(20) (20)[/tex]
When we condense this phrase, we get:
[tex]x = [19 +/- sqrt(361 - 240)] / 40 x = [19 +/- sqrt(121)] / 40\sx = [19 ± 11] / 40[/tex]
Therefore, The zeros of a quadratic equation [tex]f(x) = 20x2 - 19x + 3[/tex] are as follows: [tex]x = (19 Plus 11) / 40 = 1 and x = (19 − 11) / 40 = 0.2.[/tex]
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Solve please geometry, solve for x
Answer: The answer is D
Step-by-step explanation:
Pythagorean theorem: a²+b²=c²
x²+x²=14²
2x²=196
Evaluate...
x=7√2
Class Members read the following number of pages over the weekend 9,11,7,10,9,8,7,13,2,12,10,9,8,10,11,12 which number is an outlier? Explain your reason
Answer: 2
Step-by-step explanation:
because the common range here is 7-13.
2 isnot in this common range so it could be identified as an outlier
how many positive perfect square integers are factors of the product $\left(2^{10}\right)\left(3^{12}\right)\left(5^{15}\right)$?
By the multiplication principle of counting, the total number of positive perfect square factors of the product is the product of the number of choices for each prime factor, which is $6\times7\times8=336$. Therefore, 336 positive perfect square integers are factors of(2¹⁰ )(3¹² )(5¹⁵)
We can find the number of positive perfect square integers that are factors of the given product by first considering the prime factorization of the product, which is (2¹⁰ )(3¹² )(5¹⁵)
To get a perfect square factor, we need each prime factor to have an even exponent. Therefore, we can choose any even exponent for the prime factors of 2, 3, and 5, respectively, as long as the exponents are not greater than 10, 12, and 15, respectively.
For the factor of 2, we can choose any even exponent from 0 to 10, so there are 6 choices. Similarly, for the factor of 3, we can choose any even exponent from 0 to 12, so there are 7 choices. Finally, for the factor of 5, we can choose any even exponent from 0 to 15, so there are 8 choices.
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what is the radius of the circle open parenthesis, x minus 1, close parenthesis, squared, , open parenthesis, y 1, close parenthesis, squared,
The radius of the circle defined by the equation (x-x₁)² + (y-y₁)² is given by the formula √((x - x₁)² + (y - y₁)²).
You have been asked to find the radius of a circle that is defined by the equation (x-₁)² + (y-₁)². This equation represents all the points that are a certain distance away from the point (₁,₁).
To find the radius, we need to determine the distance from the center (₁,₁) to any point on the circle. Since the circle is defined by the equation (x- x₁)² + (y- y₁)², we can use the distance formula to find the radius.
The distance formula states that the distance between two points (x₁, y₁) and (x₂, y₂) is given by:
distance = √((x₂ - x₁)² + (y₂ - y₁)²)
In this case, we want to find the distance from the center (₁,₁) to a point on the circle (x,y). Using the distance formula, we can write:
radius = √((x - x₁)² + (y - y₁)²)
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he triangles below are similar. Triangle X Y Z. Side X Z has a length of 12, Z Y is 16, Y X is 14. Triangle R Q S. Side R Q is 3.5, Q S is 4, S R is 3. Which similarity statement expresses the relationship between the two triangles? Triangle X Y Z is similar to Triangle Q R S Triangle X Y Z is similar to Triangle R Q S Triangle Z X Y is similar to triangle Q S R Triangle Z X Y is similar to triangle Q R S
Answer:
Triangle XYZ is similar to Triangle RQS
Step-by-step explanation:
Triangle XYZ is similar to Triangle RQS
XZ/SR = 12/3 = 4
ZY/QS = 16/4 = 4
YX/RQ = 14/3.5 = 4
similar figures have all corresponding sides in the same ratio
One type of flower is growing in a pond. The flowers F in the pond are growing exponentially.
0 200
1 800
Answer:
The function that models the number of flowers, F(t), is given as F(t) = cd, where c and d are constants. We need to find the values of c and d in order to write the equation for the number of flowers in the pond at time, t.
From the table, we know that when t=0, F(t) = 200. This means that:
F(0) = cd = 200
Similarly, when t=1, F(t) = 800. This means that:
F(1) = cd = 800
We can solve this system of equations for c and d by dividing the second equation by the first equation:
F(1)/F(0) = 800/200
4 = d/c
Now we can substitute the value of d/c into either equation to solve for one of the constants. Let's use the first equation:
cd = 200
c(d/c) = 200
d = 200/c
Substituting this into the equation d/c = 4, we get:
4 = d/c = (200/c) / c
4c = 200
c = 50
Now we can find the value of d using d = 200/c:
d = 200/50 = 4
Therefore, the equation for the number of flowers in the pond at time, t, is:
N(t) = cd = 50(4) = 200
So, the answer is N(t) = 200(1), which means that at any time t, the number of flowers in the pond is 200.
The area of a sector of a circle with a central angle of 5 radians is 15cm². Find the radius of the circle.
Do not round any intermediate computations. Round your answer to the nearest tenth.
The area of a sector of a circle is equal to the central angle in radians multiplied by the square of the radius.
Therefore, we can use this formula to solve for the radius:
Area = (Central Angle) × (Radius)²
Therefore, we can rearrange this formula to solve for the radius:
Radius = √(Area / Central Angle)
Plugging in the values given, we get:
Radius = √(15 cm² / 5 rad)
Simplifying, we get:
Radius = 3 cm
Therefore, the radius of the circle is 3 cm, rounded to the nearest tenth.
Marcia Gadzera wants to retire in San Diego when she is 65 years old. Marcia is now 50 and believes she will need $90,000 to retire comfortably. To date, she has set aside no retirement money. If she gets interest of 10% compounded semiannually, how much must she invest today to meet her goal of $90,000?
Answer:
Step-by-step explanation:
We can use the formula for the future value of an annuity to determine how much Marcia needs to invest today to meet her retirement goal of $90,000. The formula for the future value of an annuity is:
FV = PMT x [(1 + r/n)^(n*t) - 1] / (r/n)
where:
FV = future value of the annuity
PMT = payment (or deposit) made at the end of each compounding period
r = annual interest rate
n = number of compounding periods per year
t = number of years
In this case, we want to solve for the PMT (the amount Marcia needs to invest today). We know that:
Marcia wants to retire in 15 years (when she is 65), so t = 15
The interest rate is 10% per year, compounded semiannually, so r = 0.10/2 = 0.05 and n = 2
Marcia wants to have $90,000 in her retirement account
Substituting these values into the formula, we get:
$90,000 = PMT x [(1 + 0.05/2)^(2*15) - 1] / (0.05/2)
Simplifying the formula, we get:
PMT = $90,000 / [(1.025)^30 - 1] / 0.025
PMT = $90,000 / 19.7588
PMT = $4,553.39 (rounded to the nearest cent)
Therefore, Marcia needs to invest $4,553.39 today in order to meet her retirement goal of $90,000, assuming an interest rate of 10% per year, compounded semiannually.
Answer the question below: *
Tasha is planning an expansion of a square flower garden in a city park. If each side of the original garden is
increased by 5 m, the new total area of the garden will be 121 m². Find the length of each side of the original garden.
O 6 meters
O 6.6 meters
O 11 meters
O 16 meters
Sea "x" la longitud de cada lado del jardín original en metros.
La superficie del jardín original es x^2 m².
Si cada lado del jardín original se aumenta en 5 m, el nuevo lado del jardín será de (x+5) metros, y la nueva superficie será (x+5)^2 m².
Según el problema, la nueva superficie total es de 121 m²:
(x+5)^2 = 121
Tomando la raíz cuadrada en ambos lados:
x+5 = 11
Restando 5 en ambos lados:
x = 6
Por lo tanto, la longitud de cada lado del jardín original es de 6 metros.
Por lo tanto, la respuesta correcta es O 6 metros.
x - the length of each side of the original garden
A = x²
( x + 5 )² = 121 /√
x + 5 = 11, or x + 5 = - 11;
x = 11 - 5
x = 6 ( another solution in negative )
Answer:
A ) 6 m
I’m having a hard time understanding how to get the Domain and Range. If you help please
Answer:
[-1,inf) and [-2,inf)
Step-by-step explanation:
Domain is all the X coordinates that the function will pass through. it starts at -1 and goes to inf so [-1,inf) is the domain. The range is all the Y coordinates the function will pass through. It starts at -2 and goes up to inf so [-2,inf) and that is your answer
The temperature in Australia one morning was -5°c at 08:00 and increased by 2°c every hour until 12:00 what temperature will it be at 11:30
the temperature in Australia at 11:30 would be 2°C.
How to find?
We can use a simple formula to calculate the temperature at 11:30 based on the initial temperature and the rate of increase.
Between 8:00 and 12:00, the temperature increases by 2°C every hour, for a total of 4 hours. So the temperature at 12:00 will be:
-5°C + (4 hours x 2°C/hour) = -5°C + 8°C = 3°C
To find the temperature at 11:30, we need to calculate how many hours have passed since 8:00. From 8:00 to 11:00, it has been 3 hours. And from 11:00 to 11:30, it has been an additional 0.5 hours. So, the total time since 8:00 is 3.5 hours.
To find the temperature at 11:30, we can use the same formula as before, but substitute 3.5 for the number of hours:
-5°C + (3.5 hours x 2°C/hour) = -5°C + 7°C = 2°C
Therefore, the temperature in Australia at 11:30 would be 2°C.
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Corresponding sides of similar triangles are proportional. Use this fact to find the length of side PR of the following pair of similar triangles. Remember that the length cannot be negative, and there may be more than one solution.
The length of side PR can be either 14 or 5.
Describe corresponding sides ?In geometry, corresponding sides are the sides of two or more geometric figures that are in the same relative position to each other. When two or more figures are similar, their corresponding sides are in the same ratio or proportion, meaning that the ratio of the length of one side in the first figure to the length of the corresponding side in the second figure is constant. For example, if two triangles are similar, then their corresponding sides are proportional to each other. The side that corresponds to another side is typically identified using the same letter with a prime symbol (') added to it.
Since the triangles PQR and STV are similar, their corresponding sides are proportional. That is,
PR / SV = QR / TV
Substituting the given lengths, we get:
(3x-19) / (3x-9) = (x-4) / 12
Cross-multiplying and simplifying, we get:
36x - 228 = (3x-9)(x-4)
36x - 228 = 3x^2 - 21x + 36
3x^2 - 57x + 264 = 0
Dividing both sides by 3, we get:
x^2 - 19x + 88 = 0
Factoring the quadratic equation, we get:
(x-11)(x-8) = 0
Therefore, x = 11 or x = 8.
If x = 11, then PR = 3x-19 = 3(11) - 19 = 14.
If x = 8, then PR = 3x-19 = 3(8) - 19 = 5.
Therefore, the length of side PR can be either 14 or 5.
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A cultural researcher tests whether individuals from different cultures share or differ in the belief that dreams have meaning.
Independent Variable: ________
Quasi-Independent Variable: ________
Dependent Variable: ________
IV individuals from different cultures
DV the belief that dreams have meaning.
Independent Variable: Culture
Belief in the meaning of dreams is a quasi-independent variable (since it cannot be manipulated or assigned randomly)
The response to whether or not dreams have meaning is the dependent variable.
What are the three kinds of variables?An experimental investigation typically contains three types of variables: independent variables, dependent variables, and controlled variables.
What is the independent or quasi-independent variable?A compared to the rest of the country. Because the variable levels are pre-existing, it is not possible to assign participants to groups at random.
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59, 60, 61, 62, 63, 64, 65, and 66 Find the values of x for which the series converges. Find the sum of the series for those values of x. 59. § (-5)".z" n=1 Answer + 00 60. Σ(α + 2)" n=1 61. (x - 2)" 3" n=0 Answer + 62. (-4)" (x - 5) n=0 00 63. 2" ch NO Answer
The values of x for which the series converges is x ∈ (-1/5, 1/5). The sum of the series for those values of x is (-5x)/(1 + 5x).
The series is [tex]\Sigma^{\infty}_{n=1}(-5)^nx^n[/tex].
We can write this series as [tex]\Sigma^{\infty}_{n=1}(-5x)^n[/tex].
This is a infinite geometric series with first term a = -5x and common ration r = -5x.
It is convergent when
|r| < 1
|-5x| < 1
|-5| |x| < 1
5|x| < 1
Divide by 5 on both side, we get
|x| < 1/5
The series is convergent when x ∈ (-1/5, 1/5).
Sum of the series is
Sₙ = a/1 - n
Sₙ = (-5x)/{1 - (-5x)}
Sₙ = (-5x)/(1 + 5x)
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The complete question is:
Find the values of x for which the series converges. Find the sum of the series for those values of x.
[tex]\Sigma^{\infty}_{n=1}(-5)^nx^n[/tex]
Calculate the standard deviation of ABC stock returns given the following historical series of returns. Year Rate of Return 1 −12% 2 10% 3 5% 4 −7% 5 3%
The value of standard deviation of the stock returns is 10.246%.
What is standard deviation?The variance or dispersion of a group of data points is measured by standard deviation. Finding the square root of the variance, which is the sum of the squared deviations between each data point and the mean, is how it is determined. In statistics, the term "standard deviation" is used to characterise the distribution of a data collection and to estimate the probability of certain outcomes or events.
The standard deviation is determined using the formula:
√(V).
The mean of the given data is:
(−12 + 10 + 5 − 7 + 3) / 5 = −0.2%
Now, the variance is:
Variance = [ (−12 − (−0.2))² + (10 − (−0.2))² + (5 − (−0.2))² + (−7 − (−0.2))² + (3 − (−0.2))² ] / 5
Variance = 104.96
Now, for standard deviation:
Standard deviation = √(104.96) = 10.246%
Hence, the value of standard deviation of the stock returns is 10.246%.
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