Answer:
3 km/h
Step-by-step explanation:
You want to know the speed of the river current if floating 36 km downstream takes 9 h longer than the trip upstream in a boat with a speed relative to the current of 15 km/h.
TimeThe relation between time, speed, and distance is ...
time = distance / speed
If c represents the speed of the current, then 15-c is the speed upstream. The relation between the travel times is ...
36/(15 -c) = 36/c -9
SolutionMultiplying by c(15-c), we have ...
36c = 36(15 -c) -9(c)(15-c) . . . . . . . multiply by c(15-c)
36c = 540 -36c -135c +9c² . . . . . eliminate parentheses
9c² -207c +540 = 0 . . . . . . . collect terms
c² -23c +60 = 0 . . . . . . . . divide by 9
(c -20)(c -3) = 0 . . . . values that make the factors zero are c=20, c=3
The speed of the current is 3 km/h.
__
Additional comment
The speed of the current cannot be greater than 15 km/h, or the boat could not go upstream. The speed of the current cannot be greater than 4 km/h, or the trip downstream would take less than 9 hours.
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Identify the population and the sample. Lena wants to open a new restaurant in a mall and needs to determine what kind of food to serve to attract the most customers. Out of 1200 mall visitors, 200 are asked their food preference.
The total mall visitors is the population parameter of the experiment
The sample of the experiment is 200, while the population is 1200
How to identify the sample and the experiment?From the question, we have the following parameters:
Total mall visitors = 1200Visitors interviewed = 200The total mall visitors is the population while the visitors that were asked of their food preference are the sample
Hence, the sample of the experiment is 200, while the population is 1200
Read more about sample and population at:
https://brainly.com/question/9910540
Solve these equation
4(3-x)=(1-2x)
To attempt this algebraic equation we will be multiplying 4 to (3 - x) bracket so as to form the term on L.H.S.
[tex]:\implies\tt{4(3 - x) = (1 - 2x)}[/tex]
[tex]:\implies\tt{(12 - 4x) = (1 - 2x)}[/tex]
[tex]:\implies\tt{12 - 4x = 1 - 2x}[/tex]
Combining like terms, we get,
[tex]:\implies\tt{12 - 1 = - 2x + 4x}[/tex]
[tex]:\implies\tt{11 = 2x}[/tex]
[tex]:\implies\tt{2x = 11}[/tex]
[tex]:\implies\tt{x = \frac{11}{2} }[/tex]
[tex]:\implies\tt{x = 5.5}[/tex]
The value of x is 5.5Hey there!
4(3 - x) = (1 - 2x)
4(3) + 4(-x) = 1 - 2x
12 - 4x = 1 - 2x
-4x + 12 = -2x + 1
ADD 2x to BOTH SIDES
-4x + 12 + 2x = -2x + 1 + 2x
SIMPLIFY IT!
-2x + 12 = 1
SUBTRACT 12 to BOTH SIDES
-2x + 12 - 12 = 1 - 12
SIMPLIFY IT!
-2x = -11
DIVIDE -2 to BOTH SIDES
-2x/-2 = -11/-2
SIMPLIFY IT!
x = 11/2
Therefore, your answer should be:
x = 11/2
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)
Triangle ABC was transformed to create triangle DEF.
2 triangles are shown. Triangle A B C has point A at the top, B on the bottom right, and point C on the bottom left. Triangle D E F has point D at the top, E on the bottom right, and F on the bottom left. The triangles are identical.
Which statement is true regarding the side in the image that corresponds to Side length B A?
Side length B C corresponds to Side length B A because they are about the same length.
Side length E D corresponds to Side length B A because they are in the same position.
Side length E F corresponds to Side length B A because the transformation is isometric.
Side length F D corresponds to Side length B A because the length is not preserved.
Answer: Side length E D corresponds to Side length B A because they are in the same position.
Step-by-step explanation:
Answer: b
Step-by-step explanation:
What is the measure of < L
Answer:
C.
Step-by-step explanation:
Because of the K And j = K and L.Those are equal of the length.
And also, I believed the angel of K is 130 degrees ...
I hope it can help you a lots...Thanks.
Answer:
C
Step-by-step explanation:
typical property of isoceles triangle
properties:
1.- Base angles are equal
2. has two sides equal
☆the two above are key to identifying an isoceles triangle
the one above satisfies no.2
brainliest please
Kyle goes to the movies with his friends. Each person buys a ticket and two equally priced snacks at the snack bar. Let ticket price be represented by t and the price of the snacks be represented by s. Kyle says the total cost can be represented by the expression 5(t + 2s). Which explanation represents Kyle’s thinking about how to find the total price?
A.
Add the price for each item bought by each person.
B .
Add the total cost of the tickets with the total cost of the snacks for all the people that went to the movie.
C .
Multiply the ticket total by the snack total.
D .
Multiply the total spent on tickets plus snacks by the number of people who went to the movie.
Answer:
The correct answer is actually D
Step-by-step explanation:
i am 100% correct because i just answered this
See
one ticket means it's only 1t or tTwo equally packed snacks means
2×s2sSo if no of friends be 5
Then total is 5(t+2s)Option D
PLIS DOY CORONA Y TODO ESO PERO PORFAA AHORITaaaaaaaaaaaaaaaaaaaaa
no te vallas :(
Answer:
n=5 x=6
Step-by-step explanation:
2n+1 +n = 16
3n+1 =16
3n=15
n=5
2x+x+x+1 =25
4x+1=24
4x=24
x=6
Joel has 24 sports trophies. Of the trophies 1/8 are soccer trophies. How many soccer does Joel have ?
Answer:
We are given that Joel has 24 sports trophies, of the 24 trophies there are 1/8 soccer trophies.
1/8 of 24 is 3.
24 divided by 8 = 3 soccer trophies
There are 3 soccer trophies all the rest of the trophies, which is 21 trophies, will be other sports. 21 trophies + 3 soccer trophies = 24 trophies in total
Step-by-step explanation:
Have a great rest of your day
#TheWizzer
Using the Fibonacci sequence of numbers a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15. Find the 3rd ration. Do not forget to change to %. a 423.6% b 161.8% c 261.8% d 50%
Answer: I'm sorry is this a real question
In the drawing, what must be the coordinates of D to show ABCD is a square?
what is equivalent to 2^5
Answer:
Step-by-step explanation:
2⁵ = 2*2*2*2*2
= 32
find the sum of the interior angle measures of a regular polygon with 22 sides
Answer:
Step-by-step explanation:
We can split this into 20 triangles, each with an angle sum of 180 degrees.
So 180(20) = 3600 degrees.
Zeema gets paid £13,440 per annum.
Assuming she gets paid in equal monthly payments, how much does she earn per month?
Answer:
2130 per month
Step-by-step explanation:
25,560 / 12
2130
A triangle has two sides of length 14 and 19. What is the largest possible whole-number length for the third side?
its 33 I checked it mark the one above me brainiest
Write x=2 in slope intercept form
When x=a the slope is undefined . And when y is b the slope is zero
Will give
BRAINLY AND FIVE STARS and A THANKS
Answer:
k = 12h
Step-by-step explanation:
Since each of the inputs of h can be mutiplied by 12 to get the output k, the equation is k = 12h
Hope this helps :)
Please help me with this please and thank you
Answer:
so i wrote the steps but not the answers, if you want i can write the answers too
Step-by-step explanation:
hello! so here all you have to do is substitute the given points of x to the equation. then you put two points on the graph. (two points on each graph) i can write the answers if you want, but please try first! if you cant ill help some more and show how to do it.
Find the radius when the area is 452.16 in^2
area = pi x r²
3,14 x r² = 452,16
r² = 144
r = 12
¡Practicamos!
create 10 sentences answer the questions asked
use this vocabulary:
el menú
la cuenta
el camarero / la camarera
el azúcar
el tenedor
la sal
la pimienta
la servilleta
el cuchillo
la cuchara
el vaso
el plato
la taza
me faltan
le traigo
me trae
de nada
¿algo más?
delicioso
¡Qué rica!
pedir
Tengo calor
Tengo frío
el postre
otro
tengo sueño
ahora
¿Qué desean Uds?
During the party, you will help serve food. To practice, pretend that you have to answer the following questions from guests.
1. ¿Dónde están los platos?
2. Me faltan la sal y la pimienta. ¿Me trae a la mesa?
3. ¡Qué rico! ¿Necesito azúcar o ya estátext annotation indicator en el café?
4. ¿Uds tiene camareros o necesito servir comida para mis niños?
5. Describe el menú por favor.
6. ¿Tienen otros postres con el pastel?
7. Necesito pedir refrescos. ¿Qué tipo tienen Uds.?
8. ¿Dónde están las servilletas?
9. Tengo frío. ¿Tienen Uds. algunas mesas a fueratext annotation indicator, en el sol?
10. ¿Cuál es la comida mejor, que Ud. recomienda?
Answer:
All
Computing
Commerce
verb
past tense: wrote
1.
mark (letters, words, or other symbols) on a surface, typically paper, with a pen, pencil, or similar implement.
"he wrote his name on the paper"
Similar:
put in writing
write down
put down
put in black and white
commit to paper
jot down
note
note down
make a note of
set down
take down
mark down
record
register
log
list
make a list of
inscribe
sign
scribble
scrawl
pencil
2.
compose, write, and send (a letter) to someone.
"I wrote a letter to Alison"
Similar:
correspond
write a letter
communicate
Lin is trying to earn money to go to knott's. She already has $15 saved up, and her dad is paying her $3 per chore she does. She needs at least $52 to get into the park.
Answer:
Lin needs to do 16 more chores if she wants to be able to pay the park fee
Step-by-step explanation:
Hope this helps! Please let me know if you need more help, or if you think my answer is incorrect. Brainliest would be MUCH appreciated. Have a wonderful day!
I kinda need help : /
Answer:
24 square units
Step-by-step explanation:
There are a couple of ways you can figure the area of the frame:
subtract the inner area from the outer areamultiply the width of the frame by the length of its centerline__
SubtractThe dimensions of the outer rectangle are twice the frame width plus the dimensions of the inner rectangle. That makes them 8 wide by 6 high. Then the difference of areas is ...
A = (8)(6) -(6)(4) = 48 -24 = 24 . . . . square units frame area
__
Width by LengthThe centerline of the frame is a rectangle with 1 unit greater length and width than the inner rectangle. It is 7 units by 5 units, so will have a perimeter of ...
P = 2(L+W) = 2(7+5) = 24 . . . . units
Then the area of the frame is this length multiplied by the width of the frame:
A = (24)(1) = 24 . . . . square units frame area
yo can i get a hand here just so i dont get it wrong
[tex]__________________________[/tex]
B. 72 IS THE QUOTIENT OF THE EXPRESSION72 is an addend in the expression and not the quotient.(25 POINTS!!!!) HELP
Answer:
Step-by-step explanation:
A house on the market was valued at $418,000. After several years, the value increased by 9 percent. By how much did the house’s value increase in dollars? What is the current value of the house?
How to find the area of composite figure steps
Answer: To find the area of a composite figure or other irregular-shaped figure, divide it into simple, nonoverlapping figures. Find the area of each simpler figure, and then add the areas together to find the total area of the composite figure.
Step-by-step explanation:
Nine wolves, eight female and one male, are to be released into the wild three at a time. If the male wolf is to be in the first released group and order does not matter, in how many ways can the first group of three wolves be formed? 28 ways 36 ways 56 ways 84 ways.
The first group of three wolves can be formed in 28 ways.
We have been given that Nine wolves, eight female and one male, are to be released into the wild three at a time.
What is the meaning of combination?
A combination is a combination of n things taken k at a time without repetition.
We need to choose 1 male wolf out of 1 wolf male. So we can choose one wolf as
[tex]c(1,1)=\frac{1!}{1!(1-1)!} =\frac{1!}{1!}=1!=1[/tex]
We can choose 1 male wolf in only 1 way.
Since the female wolfs are identical that means order doesn't matter, so we will use combinations.
We can choose 2 female wolves out of 8 as
[tex]C(8,2)=\frac{8!}{2!(8-2)!} =\frac{8\times 7 \times 6!}{2\times 1\times 6!} =\frac{8\times 7}{2} =28[/tex]
Therefore, we can choose 2 female wolves out of 8 female wolves in 28 ways.
We have to find number of ways in which the first group of three wolves can be formed we will multiply the ways of choosing 1 male wolf and 2 female wolves.
Number of ways farming first group of three wolves
1(28)=28
Therefore, the first group of three wolves can be formed in 28 ways
To learn more about the combination visit:
https://brainly.com/question/25821700
Which expression is equivalent to this equation attached? Please help! I will make brainliest
Step-by-step explanation:
please mark me as brainlest
One day, the weather report shows that boston is experiencing a temperature of -27 degrees, while london is experiencing a temperature of 37 degrees. which city is colder?
Answer:
Obviously Boston, since -27 is much less than 37
Hi please help me out and add an explanation if u can!
What do we know
-the pentagon is a regular pentagon meaning all its side lengths
are equal since all the sides have one tick mark which says all
the side lengths are equal
2. Solve:
Perimeter: 6 + 6 + 6 + 6 + 6 = 30cm
Question 2: Find the height of the prismHeight of the prism
⇒ distance between the base pentagon and the top pentagon
⇒ Height is 6 cm
Question 3: Find the Lateral AreaDefinition of Lateral Area: it is only the area of the non-base faces
⇒ the non-base faces are the squares on the side of the figure
⇒ there are 5 squares
⇒ Lateral Area = 5 * (Area of Square) = 5 * (6 * 6) = 180 square cm
Question 4: Find the area of the base
The formula for the pentagon's area ⇒ [tex]\frac{5}{2}*s*a[/tex]
s --> length of the sides of the pentagon --> 6cma --> apothem length --> 4.1 cm*apothem is the distance from the center of the pentagon to any
one of the sides
Area = [tex]\frac{5}{2} *6*4.1 = 15 * 4.1 =[/tex] 61.5 square centimeters
Question 5: Find the surface areaDefinition of Surface Area: all the areas of different sides added upSurface Area = 2 * (Area of Base) + (Lateral Area)
= 2 *61.5 + 180 = 123 + 180 = 303 square centimeters
Hope that helps!
The radius of a circle is 2 inches. What is the length of a 180
Answer:
4pi or 12.6
Step-by-step explanation:
I hope this helps
I need help please help me
Method 1 :
replace x and y by their value 1 and 3
3 = 4(1) - 1 = 4-1 = 3
2(1) + 3 = 2 + 3 = 5
correct
Method 2 :
y = 4x - 1
2x + y = 5
y = 4x - 1
y = -2x + 5
y - y = 4x - 1 - ( -2x + 5 )
0 = 4x - 1 + 2x - 5
6x - 6 = 0
6x = 6
x = 6/6 = 1
y = 4x - 1
y = 4(1) - 1
y = 3
correct
Answer:
Yes the points (1,3) is the solution for the systems of equations that are shown
Step-by-step explanation:
y = 4x - 1
plug in the numbers
3 = 4(1) - 1
3 = 4 - 1
3 = 3 so this is correct
2x + y = 5
plug in the numbers
2(1) + 3 = 5
2 + 3 = 5
5 = 5
so that means the points are also a solution for BOTH