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3 years ago

How many boys are in the choir

Mathematics

1 answer:

Dafna11 [192]3 years ago

8 0

9514 1404 393

Answer:

D. 210

Step-by-step explanation:

If b is the number of boys in the choir, the ratio of boys to girls is ...

b/150 = 7/5

b = 150(7/5) = 30(7) = 210

There are 210 boys in the choir.

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3 years ago

Read 2 more answers

Solving systems of Equations Word Problems - CLASSWORK

dem82 [27]

Answer:

Part A) For the number of hours less than 5 hours it make more sense to rent a scooter from Rosie's

Part B) For the number of hours greater than 5 hours it make more sense to rent a scooter from Sam's

Part C) Yes, for the number of hours equal to 5 the cost of Sam'scooters is equal to the cost of Rosie's scooters

Part D) The cost is $90

Step-by-step explanation:

Let

x-------> the number of hours (independent variable)

y-----> the total cost of rent scooters (dependent variable)

we know that

Sam's scooters

$y=8x+30$

Rosie's scooters

$y=10x+20$

using a graphing tool

see the attached figure

A. when does it make more sense to rent a scooter from Rosie's? How do you know?

For the number of hours less than 5 hours it make more sense to rent a scooter from Rosie's (see the attached figure) because the cost in less than Sam' scooters

B. when does it make more sense to rent a scooter from Sam's? How do you know?

For the number of hours greater than 5 hours it make more sense to rent a scooter from Sam's (see the attached figure) because the cost in less than Rosie' scooters

C. Is there ever a time where it wouldn't matter which store to choose?

Yes, for the number of hours equal to 5 the cost of Sam'scooters is equal to the cost of Rosie's scooters. The cost is $70 (see the graph)

D. If you were renting a scooter from Rosie's, how much would you pay if you were planning on renting for 7 hours?

Rosie's scooters

$y=10x+20$

For x=7 hours

substitute

$y=10(7)+20=90$

The cost is $90

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3 years ago

Type of Ball football basketball baseball softball

crimeas [40]

Answer:

1.- He received 388 dollars in exchange.

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= 488

3.- I buy 15 basketballs.

And I buy 6 soccer balls.

4.- (135 ÷ 9) (48 ÷ 8)

= 15, 6

Step-by-step explanation:

I hope I have helped you can you put that this is the smartest answer please?

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3 years ago

A newspaper invited readers to call a telephone number and record their comments. The next day they reported that readers overwh

maks197457 [2]

Answer: Self selected sample

Step-by-step explanation:

They people chose themselves

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3 years ago

How do you do this the test is tomorrow and I forgot how to do this?

MrRa [10]

Some things you need to know:

1) You need to know how to convert standard form to slope y-int. form and slope y-int. form to standard form.

2) When two lines are parallel, the slopes are the same.

3) When two lines are perpendicular, the slopes are negative reciprocals of each other. (Or their product is -1)
example: 3/4 --> -4/3.
3/4 * -4/3 = -12/12 = -1

4) To find the value of b, substitute the point into the equation.

5) Convert the equation to slope y-int. form to find the slope.

6) When a line has an undefined slope, the slope y-int. will look either like
y = __ (forms horizontal line) or x = __ (forms vertical line).
To find the perpendicular of these lines, turn y to x / x to y.
To find the value of __, look at the point located in the line, so if x = ___
passes through (5,3), then x = 5 because x = 5 in the point. So the
equation would be x = 5.

Use online practice tests and other sources if you don't understand.

5 0

3 years ago

How many boys are in the choir​

How many boys are in the choir