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2 years ago

15

A student is saving money to buy a video game. The student currently has $20 and plans to save $10 every month. Write a function

that represents the amount y
(in dollars) of money that the student saves after x
months.

2 answers:

Bad White [126]2 years ago

5 0

The answer is: y=20+10x

tatuchka [14]2 years ago

4 0

The answer would be y=20+10x

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The height of a stuntperson jumping off a building that is 20 m high is modeled by the equation h = 20 -57, where t is the time

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A stuntman jumping off a 20-m-high building is modeled by the equation h = 20 – 5t2, where t is the time in seconds. A high-speed camera is ready to film him between 15 m and 10 m above the ground. For which interval of time should the camera film him?

Answer:

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Step-by-step explanation:

Given:

A stuntman jumping off a 20-m-high building is modeled by the equation

$h =20-5t^{2}$ -----------(1)

A high-speed camera is ready to making film between 15 m and 10 m above the ground

when the stuntman is 15m above the ground.

height $h = 15m$

Put height value in equation 1

$15 =20-5t^{2}$

$5t^{2} =20-15$

$5t^{2} =5$

$t^{2} =1$

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We know that the time is always positive, therefore $t=1$

when the stuntman is 10m above the ground.

height $h = 10m$

Put height value in equation 1

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$5t^{2} =10$

$t^{2} =\frac{10}{5}$

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$t=\pm\sqrt{2}$

$t=\sqrt{2}$

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2 years ago