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netineya [11]
3 years ago
14

Which equation is a function of x?

Mathematics
2 answers:
horrorfan [7]3 years ago
7 0

Answer:

a

Step-by-step explanation:

GrogVix [38]3 years ago
6 0

Answer:

a because a variable cannot be a variable

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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:

1\leq t\geq \sqrt{2}

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  

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15 =20-5t^{2}

5t^{2} =20-15

5t^{2} =5

t^{2} =1

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Put height value in equation 1

10 =20-5t^{2}

5t^{2} =20-10

5t^{2} =10

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

t^{2} =2

t=\pm\sqrt{2}

t=\sqrt{2}

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