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Amiraneli [1.4K]

3 years ago

5

William says that 15 years from now his age will be 3 times his age 5 years ago if x represent William present age complete the

following sentence

1 answer:

vlada-n [284]3 years ago

5 0

He is 15 currently.

x + 15 = x - 5

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Answer:

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Step-by-step explanation:

We are given our function as

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We are asked to determine the values of current c at which the power P(c) is equal to 0

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Now we solve the above equation for c

subtracting 180 from each side we get

$-180=-20(c-3)^2$

Dividing both sides by -20

$(c-3)^2=9$

Taking square root on both sides

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adding 3 on both sides

c=±3+3

hence

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or

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Now we have to find the c at which the power will be the highest

$P(c)=-20(c-3)^2+ 180$

Represents a parabola

subtracting 180 from both sides we get

$P-180=-20(c-3)^2$

Comparing it with standard parabola

$(y-k)^2=-4k(x-h)^2$

(h,k) will be the coordinates of the vertex

Hence here

h=3 , k = 180

Hence in this equation $P-180=-20(c-3)^2$

The vertex will be (3,180)

Or at c=3, P = 180 the maximum

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Step-by-step explanation:

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stellarik [79]

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Step-by-step explanation:

Given,

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