Which of these subsets are subspaces ofM2×2? For each one that is a subspace, write it as a span. For each one that is not a subspace, state the condition that fails. (a). A = {((a, 0), (0, b)): a+b = 5}

cos(-180°) = -1

tan 8° = 0.1425

cos 690° = 0

sin (8-180°) = - sin 172° = - 0.9997

cos² (6-90°) = cos(-84°) = 0.4997

Therefore, the answer to the expression is -0.4997.

Answer:

If a polygon is dilated by a scale factor of k, then its area is multiplied by k².

a. When k = 4, the area of the image is 10 × 4² = 160 square units.

b. When k = 1.5, the area of the image is 10 × 1.5² = 22.5 square units.

c. When k = 1, the area of the image is 10 × 1² = 10 square units. (The image is the same size as the original.)

d. When k = 1/3, the area of the image is 10 × (1/3)² = 10/9 square units.

Step-by-step explanation:

Answer:

Step-by-step explanation:

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Answer:

x = 94°

Step-by-step explanation:

ABCD is a cyclic quadrilateral , its 4 vertices lie on the circle.

the opposite angles of a cyclic quadrilateral sum to 180° , that is

x + 86° = 180° ( subtract 86° from both sides )

x = 94°

In conclusion, the probability that 45 or more people in a sample of fifty 18-20 year olds have consumed alcoholic beverages is 0.0006. This can be calculated by using the binomial distribution formula or by visually representing the data in a probability tree diagram.

The probability that 45 or more people in a sample of fifty 18-20 year olds have consumed alcoholic beverages is 0.0006. This can be determined by using the binomial distribution formula. The formula states that the probability of getting x successes in n trials is equal to nCr x (p)x (1-p)n-x, where n is the number of trials (in this case, 50), p is the probability of success (69.7%), and x is the number of successes (45). By plugging these values into the formula, we obtain a probability of 0.0006.

In addition to the binomial distribution formula, we can also use a visual representation such as a probability tree diagram to represent the given data. The probability tree diagram can be used to show the number of ways a certain outcome can occur. In this case, it would be the probability of 45 or more people in the sample of fifty 18-20 year olds consuming alcoholic beverages. The probability tree diagram consists of a trunk which branches off into multiple possible outcomes. At the end of each branch, there is a probability that corresponds to the probability of the given outcome occurring.

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Answer:

x = 8500

y = 15000

Step-by-step explanation:

small vans: x

large vans: y

A: 5x + 2y = 72500

B: 2x + 6y = 107000

5x + 2y = 72500 => y = (72500 - 5x)/2

2x + 6(72500 - 5x)/2 = 107000

2x + 217500 - 15x = 107000

15x - 2x = 217500 - 107000

13x = 110500

x = 110500/13 = 8500

y = (72500 - 5x)/2 = y = (72500 - 5x8500)/2 = 15000

Answer: The interest and amount to be paid at the end of 3 years is Rs.8700

Step-by-step explanation:

let P ,R, T be the Principle amount , Rate of interest and Time

             P= 6000rs

             R= 15%

             T=3 years

                      =6000rs×15r×3t÷100

                       =2700rs

                                                             = 8700rs

The cost of sales for liquor, expressed as a percentage is 19.39%.

To compute for the cost of sales for liquor, expressed as a percentage given that you have spent $2,500 on liquor for your bar and your bar sales have been $12,890, you can use the formula:

Cost of sales = (Cost of Goods Sold / Total Sales) × 100

where, Cost of Goods Sold (COGS) = Beginning Inventory + Purchases - Ending Inventory (or the total cost of goods sold during the period)

Total Sales = Gross sales - Sales discounts - Sales returns and allowances

Let's compute for the COGS first:

COGS = Beginning Inventory + Purchases - Ending Inventory

= $0 + $2,500 - $0

= $2,500

Total Sales = Gross sales - Sales discounts - Sales returns and allowances

= $12,890 - $0 - $0

= $12,890

Cost of sales is obtained as follows:

Cost of sales = (Cost of Goods Sold / Total Sales) × 100

= ($2,500 / $12,890) × 100

= 19.39%.

Therefore, the cost of sales for liquor, expressed as a percentage is 19.39%.

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Answer:

-8x^2 - 10x + 7

Step-by-step explanation:

2x^2 - 10x^2 = -8x^2

-5x - 5x = -10x

3 - (- 4) = 7

-8x^2 - 10x + 7

Hope this helps!

Answer:

  $4.80

Step-by-step explanation:

You want to know the finance charge on a balance of $480 if the APR is 12%.

The monthly finance charge is the product of the monthly interest rate and the balance. The monthly interest rate is 1/12 of the annual rate.

  finance charge = (1/12 · 12%) · $480 = 0.01 · $480 = $4.80

The finance charge on the next monthly statement is $4.80.

In given triangle, the value of t is 3.75 and the value of s is 10.4.

In a right triangle, the hypotenuse is the longest side, a "opposite" side is the one across from a given angle, and a "adjacent" side is close to a given angle. We use unique terminology to describe the sides of right triangles.

We can set up the following ratios because the two triangles in the illustration are comparable to one another:

t / 5 = 6 / 8 (using the smaller triangle)

s / 13 = 8 / 10 (using the larger triangle)

Simplifying these ratios, we get:

t / 5 = 3 / 4

s / 13 = 4 / 5

We may cross-multiply and simplify to find t and s:

t = 5(3/4) = 15/4 = 3.75

s = 13(4/5) = 10.4

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Step-by-step explanation:

From CalcWorkshop:

" Intersecting Chords Theorem. If two chords or secants intersect in the interior of a circle, then the product of the lengths of the segments of one chord is equal to the product of the lengths of the segments of the other chord "

6 * 4 = 8 * x

x = 3

The process of verifying trigonometric identity involves the use of Pythagorean theorem, double angle formula etc. The similarity between verifying a trigonometric identity and solving an equation is that it both involves mathematical expressions.

1. The process of verifying a trigonometric identity involves using various trigonometric identities and properties to manipulate one side of the equation until it is simplified to the other side. This typically involves using algebraic manipulations, such as factoring and combining like terms, as well as trigonometric identities such as the Pythagorean identity, double angle formula, or sum and difference formula.

2. One similarity between verifying a trigonometric identity and solving an equation is that both processes involve manipulating mathematical expressions. However, a key difference is that verifying a trigonometric identity requires proving that the identity holds for all values of the variables involved, whereas solving an equation involves finding the specific values of the variables that make the equation true.

3. To find the value of cos120° using the sum or difference formula, we can use the fact that 120° is equal to 60° + 60°. We can then use the cosine sum formula, which states that cos(x+y) = cos(x)cos(y) - sin(x)sin(y), with x = y = 60°. This gives us:

[tex]cos(120\°) = cos(60\° + 60\°) = cos(60\°)cos(60\°) - sin(60\°)sin(60\°) = \frac{1}{2}*\frac{1}{2} - (\sqrt(3)/2)(\sqrt(3)/2) = -1/2[/tex]

Therefore, cos120° = -1/2.

4. The sign to use in the half-angle formula for sine and cosine depends on the quadrant in which the angle lies. If the angle is in the first or second quadrant, we use the positive sign. If the angle is in the third or fourth quadrant, we use the negative sign. For example, if we want to find sin(x/2) and x lies in the third quadrant (i.e., between 180° and 270°), we use the negative sign in the formula sin(x/2) = -√((1-cos(x))/2).

5. When solving a trigonometric equation, finding all solutions means determining all possible values of the variable that make the equation true, regardless of the range of values allowed for the variable. Finding all solutions within a specific interval, on the other hand, means restricting the values of the variable to a certain range and finding all possible solutions within that range. This is important because trigonometric functions are periodic and have infinitely many solutions, so it is often necessary to specify a range of values in order to obtain a finite set of solutions.

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For the blood analysis, there are a total of twelve possible experimental outcomes. The value of random variable  for each of the experimental outcome is zero.

Therefore it can be shown as:

a. The experimental outcomes associated with performing the blood analysis are:

List out all the possible outcomes that can occur during the blood analysis.

The outcomes are based on the number of steps required for each of the procedures, with the first procedure having either one or two steps, and the second procedure having either one, two, or three steps.

   (1) - First procedure requires one step, second procedure requires one step

   (2) - First procedure requires two steps, second procedure requires one step

   (3) - First procedure requires two steps, second procedure requires two steps

   (1,1) - First procedure requires one step, second procedure requires one step

   (1,2) - First procedure requires one step, second procedure requires two steps

   (1,3) - First procedure requires one step, second procedure requires three steps

   (2,1) - First procedure requires two steps, second procedure requires one step

   (2,2) - First procedure requires two steps, second procedure requires two steps

   (2,3) - First procedure requires two steps, second procedure requires three steps

b. Let z denote the total number of steps required to do the complete analysis. The value of the random variable for each of the experimental outcomes is:

It defines the value of the random variable, z, which denotes the total number of steps required to complete the analysis. It then provides the value of z for each of the experimental outcomes. For instance, outcome (1) requires one step in the first procedure and one step in the second procedure, so the value of z is 1+1=2. Similarly, for outcome (2), the value of z is 2+1=3.

   (1) - z = 1 + 1 = 2

   (2) - z = 2 + 1 = 3

   (3) - z = 2 + 2 = 4

   (1,1) - z = 1 + 1 = 2

   (1,2) - z = 1 + 2 = 3

   (1,3) - z = 1 + 3 = 4

   (2,1) - z = 2 + 1 = 3

   (2,2) - z = 2 + 2 = 4

   (2,3) - z = 2 + 3 = 5

   (3,1) - z = 2 + 1 = 3

   (3,2) - z = 2 + 2 = 4

   (3,3) - z = 2 + 3 = 5

If an outcome does not occur, the value of the random variable is 0.This is because the outcome did not happen, and there was no analysis to perform.

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(a) Dataset with mean substantially less than median:

9, 10, 11, 12, 90

The mean of this dataset is (9+10+11+12+90)/5 = 26.4, while the median is 11, which is substantially greater than the mean. The last data value is 90, which is a positive integer less than 100.

(b) Dataset with mean substantially more than median:

98, 99, 100, 101, 200

The mean of this dataset is (98+99+100+101+200)/5 = 119.6, while the median is 100, which is substantially less than the mean. The last data value is 200, which is a positive integer less than 100.

(c) Dataset with mean equal to median:

2, 3, 4, 4, 5

The mean of this dataset is (2+3+4+4+5)/5 = 3.6, which is equal to the median (the middle value of the dataset). The last data value is 5, which is a positive integer less than 100.

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Answer: 60?

Step-by-step explanation:

The reference angle is the acute angle formed between the terminal side of an angle in standard position and the x-axis. To find the reference angle of an angle, you can follow these steps:

Determine the quadrant in which the angle terminates. For -60 degrees, this would be the fourth quadrant.

Determine the corresponding angle in the first quadrant by finding the angle formed between the terminal side and the x-axis. In the fourth quadrant, this angle is equal to 360 degrees minus the original angle. So for -60 degrees, the corresponding angle in the first quadrant is 360 - 60 = 300 degrees.

Subtract this angle from 360 degrees to find the reference angle. For -60 degrees, the reference angle is 360 - 300 = 60 degrees.

Therefore, the reference angle of -60 degrees is 60 degrees.

The number of receptacles required in the classroom is 14.

To determine the number of receptacles required in a classroom, we need to consider the electrical code requirements for the room size and layout.

According to the National Electrical Code (NEC), there should be at least one duplex receptacle for every 12 linear feet of wall space in a classroom.

In addition, there should be at least one receptacle within 6 feet of each doorway and at least one receptacle on each wall space that is 2 feet or more in width.

Using this information and the dimensions provided, we can calculate the required number of receptacles as follows:

Calculate the perimeter of the room:

Perimeter = 2(Length + Width) = 2(36 + 24) = 120 feet

Calculate the total linear feet of wall space:

Total wall space = Perimeter - Width of door = 120 - 3 = 117 feet

Determine the number of receptacles required:

Number of receptacles = Total wall space / 12 + Number of doorways + Number of wall spaces wider than 2 feet

Number of doorways = 1 (as stated in the question)

Number of wall spaces wider than 2 feet = 2 (the two 24-foot-long walls)

Number of receptacles = (117 / 12) + 1 + 2 = 11 + 1 + 2 = 14

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From the given list of vegetables, the number of different ways in which these vegetables can be selected from a list of vegetables such that no vegetable is selected more than once given here by the formula of Combination, which is: [tex]^nC_k[/tex] = n!/[k!(n-k)!].

The city café is known for its vegetable plate lunch special that comes with four vegetables, cornbread, and sweet tea. If the four vegetables can be selected from a list of ten vegetables, the formula to determine how many different vegetable plates there are would be a combination of 10 vegetables taken 4 at a time.

The number of different ways that four vegetables can be selected from a list of ten vegetables is given by the formula of Combination, which is:

[tex]^nC_k[/tex] = n!/[k!(n-k)!]

where, n = number of elements in the set = 10 vegetables

k = number of elements chosen = 4 vegetables

n - k = number of elements not chosen = 10 - 4 = 6 vegetables

Therefore, the number of different vegetable plates is:

[tex]^nC_k[/tex] = 10!/ [4!(10-4)!]

[tex]^nC_k[/tex] = (10×9×8×7)/ (4×3×2×1) = 210

Hence, there are 210 different vegetable plates.

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(x-11, y+14) = (-4-7, 7+7) = (-11,14) which matches the new coordinates T(-11,14).

In this sense, coordinates are the points where a grid system intersects. GPS coordinates are typically created by combining latitude and longitude. The distance of north and the south from the equator, which is 0 degrees iof north and south, is measured by lines of latitude.

8. T (-4,7)             7 units right, 7 units up                      (x-11, y+14)    

9. U (3,-4)               7 units left, 7 units up                         (x+7, y+7)      

10. V (-2,-10)           7 units right, 7 units down                  (x+7, y-7)  

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The simplified expression is 2cos²(x) + sinx - 1 = 0

The expression we will be simplifying is

=> 1/sinx+cosx + 1/sinx-cosx = 2sinx/sin⁴x-cos⁴x.

To begin, let us look at the left-hand side of the expression. We can combine the two fractions using a common denominator, which gives us:

(1/sinx+cosx)(sinx-cosx)/(sinx+cosx)(sinx-cosx) + (1/sinx-cosx)(sinx+cosx)/(sinx-cosx)(sinx+cosx)

Simplifying this expression using the distributive property, we get:

(1 - cosx/sinx)/(sin²ˣ - cos²ˣ) + (1 + cosx/sinx)/(sin²ˣ - cos²ˣ)

Next, we can simplify each fraction separately. For the first fraction, we can use the identity sin²ˣ - cos²ˣ = sinx+cosx x sinx-cosx to obtain:

1 - cosx/sinx = (sinx+cosx - cosx)/sinx = sinx/sinx = 1

Similarly, for the second fraction, we can use the same identity to obtain:

1 + cosx/sinx = (sinx-cosx + cosx)/sinx = sinx/sinx = 1

Substituting these values back into the original expression, we get:

1 + 1 = 2sinx/(sin⁴x - cos⁴x)

Now, we can simplify the denominator using the identity sin²ˣ + cos²ˣ = 1 and the difference of squares formula:

sin⁴x - cos⁴x = (sin²ˣ)² - (cos²ˣ)² = (sin²ˣ + cos²ˣ)(sin²ˣ - cos²ˣ) = sin²ˣ - cos²ˣ

Substituting this back into the expression, we get:

2 = 2sinx/(sin²ˣ - cos²ˣ)

Finally, we can simplify the denominator using the identity sin²ˣ - cos²ˣ = -cos(2x):

2 = -2sinx/cos(2x)

Multiplying both sides by -cos(2x), we get:

-2cos(2x) = 2sinx

Dividing both sides by 2, we get:

-cos(2x) = sinx

Using the double-angle formula for cosine, we get:

-2cos²(x) + 1 = sinx

Simplifying this expression, we get:

2cos²(x) + sinx - 1 = 0

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The reason we can't use the mean when a data set has one or two values that are much higher than all of the others is that it skews the average, making it not representative of the rest of the data.

The mean is a numerical measure of the central tendency of a data set. It is calculated by dividing the sum of all the values in a data set by the number of data points.

A data set is a collection of observations or measurements that are analyzed to obtain information. It can be represented graphically, in tabular form, or in any other format. The data set may be a sample or the entire population.

If a data set has one or two extremely high or low values, it can significantly impact the mean. These values are known as outliers. The outliers can cause the mean to be higher or lower than the actual middle value of the data.

Hence, in such cases, the median is a better choice for finding the central tendency of the data. The median is the middle value of the data set, and it is less affected by outliers than the mean. The mode, which is the value that occurs most frequently in the data set, is also a measure of central tendency that is less sensitive to outliers than the mean.

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The scale factor of the following pair of similar polygons after the dilation is 0.7

Given

The pair of similar polygons

From the pair of similar polygons, we have the following corresponding side lengths

Pre-image of the polygon = 30

Image of the polygon = 21

The scale factor of the similar polygons is then calculated as

Scale factor = 21/30

Evaluate the quotient

Scale factor = 0.7

Hence, the scale factor is 0.7

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The slope of the tangent line at the point (x,y) is -x/(2y). The ellipse's slope is not defined at the coordinates (4, 0), (-4, 0).

The rate of change of a curve at a certain position is represented by the slope of a tangent line to the curve at that location. In other words, it indicates whether the curve is steep or shallow at that particular location. Calculating the derivative of a function in calculus also requires estimating the slope of a tangent line, which is a crucial step. We may determine the slope of the tangent line and subsequently the derivative of the function at a location by determining the limit of the slope of a secant line as the two points on the line approach closer and closer together.

The equation of the ellipse is x²)/16 +y²/4=1.

We take the derivative of the equation with respect to xto find the slope:

x²/16 + y²/4 = 1

(x²/16)' + (y²/4)' = 1'

2x/16 + 2y/4 * dy/dx = 0

dy/dx = -x/(2y)

When the denominator of 2y equals 0, there are some locations where the slope is not specified. The ellipse's slope is not defined at the coordinates (4, 0), (-4, 0), and all locations on the x-axis between these two points when y = 0, which occurs.

Hence, the slope of the tangent line at the point (x,y) is -x/(2y). The ellipse's slope is not defined at the coordinates (4, 0), (-4, 0).

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Answer:

64sq cm

Step-by-step explanation:

To find area of net of square pyramid, you have to find area of the 4 triangles and area of square bottom.

Triangle Area = 1/2bh (times 4 because there are 4 triangles.

Square Area = lw

TA= 4(1/2bh)

4(1/2*4*6)

4(1/2*24)

4(12)

TA= 48 sq cm

SA= lw

4*4

SA= 16 sq cm

48 sq cm + 16 sq cm = 64 sq cm

The decoration's volume, to the closest tenth of an inch cubic, is: 308.9 cubic inches make up V.

The quantity of space that an object or substance occupies is measured by its volume. Usually, it is expressed in cubic measures like cubic metres, cubic feet, or cubic inches. By multiplying an object's length, width, and height, or by applying a formula unique to the shape of the object, one can determine the volume of the object.

given

The cylinder's radius is equal to half of its diameter, or 14/2, or 7 inches. The new water level is 9 + 2 = 11 inches because the initial water level was 9 inches and the decoration raised the water level by 2 inches.

The decoration's volume is equivalent to the volume of water it removed from the area.

We can determine the volume of the ornamentation by using the following formula: V = r2h.

V = (72/2), which equals 98 cubic inches.

The decoration's volume, to the closest tenth of an inch cubic, is: 308.9 cubic inches make up V.

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The rate of change of the distance between the cars at that instant is 5.46 meters/ second.

The first car's velocity = 7 meters per second

The second car's velocity = 3 meters per second.

Distance from the intersection of first car = 5m

Distance from the intersection of second car = 12m

The rate of change is used to numerically quantify the percentage change in value over a predetermined period of time. It is a measure of a variable's velocity.

Calculating the distance between both cars at the instant

= √(12² + 5²)

= √ 144 + 25

= √169

= 13

Calculating the rate of change of distance -

2d/dt

= d(x² + y²)/dt

= 2x dx/dt + 2ydy/dt

= 2×5×7 + 2×12×3

= 70 + 72

= 142

Therefore, total distance -

dd/dt

= 142/26

= 5.46

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The probability that it will fail to detect an underfilled can for the first time when it encounters the 10th underfilled can is approximately 0.005.

Since the probability that an automated weight monitor detects underfilled cans of beverages is 0.98, the probability that it will not detect an underfilled can for the first time when it encounters the 10th underfilled can is given by:

(1 - 0.98)10-1(0.98)

Using the formula above, we will solve for the probability below:

(1 - 0.98)10-1(0.98)≈0.005

Thus, the probability that it will fail to detect an underfilled can for the first time when it encounters the 10th underfilled can is approximately 0.005.

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Answer:

a. Goron 224

b. Smith 96

Fishman 256

Step-by-step explanation:

a. For Goron: 640 x 0.35 = 224

b. For Smith: 640 x 0.15 = 96

   For Fishman: 640 x 0.40 = 256

In the following question, among the various parts to solve- a). DVD player functions for at least 10 hours is 0.0062. b)DVD player functions for at most 13 hours is 0.8944. c). DVD players will function without battery replacement for more than 12.83 hours.

(a) Probability that the DVD player functions for at least 10 hours. (Round your answer to four decimal places.)Given, mean (μ) = 12 hours and standard deviation (σ) = 0.8 hours We can get the Z-score by, Z = X - μ/σWhere X is the time for which the DVD player functions. Z = 10 - 12/0.8Z = -2.5Now, we can find the probability by using the standard normal distribution table. From the table, the probability corresponding to -2.5 is 0.0062. Therefore, the probability that the DVD player functions for at least 10 hours is 0.0062.

(b) Probability that the DVD player works for at most 13 hours. (Round your answer to four decimal places.)Z = X - μ/σWhere X is the time for which the DVD player functions. Z = 13 - 12/0.8Z = 1.25Now, we can find the probability by using the standard normal distribution table. From the table, the probability corresponding to 1.25 is 0.8944. Therefore, the probability that the DVD player functions for at most 13 hours is 0.8944.

(c) Find a number ** such that only 15% of all DVD players will function without battery replacement for more than x* hours. (Round your answer to two decimal places.)To find the required number, we need to find the Z-score that corresponds to 85%. From the standard normal distribution table, the Z-score corresponding to 85% is 1.0364. Therefore, the required number is = μ + ZσX = 12 + 1.0364 x 0.8X = 12.8291 ≈ 12.83Therefore, only 15% of all DVD players will function without battery replacement for more than 12.83 hours.

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The length of the third side must fall between 8 and 13. This is because the sum of the lengths of any two sides of a triangle must always be greater than the length of the third side.