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3 years ago

If y varies directly as x, and y=8 when x=3, find y when x=15.

Mathematics

1 answer:

Crank3 years ago

8 0

Answer:

y=40

Step-by-step explanation:

The formula for Direct Variation is y=kx or k=y/x. In this case I would use k=y/x. If you're y is 8 and x is 3, this means that K=8/3. Using this, we know that X=15. We have to find a Y value so that the fraction with an x of 15 simplified is 8/3. To do this you would write 8/3 and y/15. Now cross multiply to get 3y=120. Divide by 3 to get y=40. View my attachment for the work!

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Write and solve a real-world problem that

Kay [80]

There are 11 that contain equal numbers of toy cars and 6 that contain equal number of helicopter toy.

<h3>Greatest common factor</h3>

John is filling in party goodie bags with toy cars and helicopters. There are 66 toy cars and 36 helicopters. Each bag must only have either toy car or helicopter - there is no mixing of toys.

Each bag must have the same number of toy cars in it.

Each bag must have the same number of toy helicopter in it.

All bags must have the same number of toys in it.

a) How many bags will contain toy cars?

b) How many bags will contain toy helicopters?

Factors of 66: 1, 2, 3, 6, 11, 22, 33, and 66.

Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, and 36

The greatest common factor of 66 and 36 it s 6

66 ÷ 6 = 11 toy cars

36 ÷ 6 = 6 helicopter toy

Therefore, there are 11 that contain equal numbers of toy cars and 6 that contain equal number of helicopter toy.

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2 years ago

PLEASE ANSWER!!!!!!!

Temka [501]

Answer:

Step-by-step explanation:

because the limo charges 30 and 4 per person and the person is x . The other limo automatically charges 70 plus 2 per person which is x hence 30+4x=70+2x

3 0

2 years ago

Read 2 more answers

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Phoenix [80]

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3 years ago

A worker wants to save enough money to buy new

allochka39001 [22]

Answer:

The least amount of numbers that he can work at his job to have enough for the headphones he wants is 17 hours.

Step-by-step explanation:

To find the number of hours you could divide the cost of the headphones by the amount he earns each hour so you would do $119/ 7 to get 17 and then you could check your answer with multiplication by multiplying 7 * 17 to get 119 which shows that he has to work at least 17 hours to get the headphones he wants.

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3 years ago

Three cylinders have bases that are the

lys-0071 [83]

SA: 2pi (r^2)+2pi(r)(h)
In order to find radius (r) of the base you must divide 10 by pi then find the square root of the result
√(10/pi)=r: 1.784cm
h: a) 8.0cm
b) 6.5cm
c) 9.4cm
2pi (3.183)+2pi(1.784)(8)=109.673cm^2
2pi (3.183)+2pi(1.784)(6.5)=92.859cm^2
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3 years ago

If y varies directly as​ x, and y=8 when x=3​, find y when x=15.

If y varies directly as x, and y=8 when x=3, find y when x=15.