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3 years ago

12

Help me!!!!!!!!!!!!!!!!!!!!!!

1 answer:

DedPeter [7]3 years ago

3 0

Hello from MrBillDoesMath!

Answer:

Choice D.

Discussion:

Substitute x = 9 in the choices

A. when x = 9, x^2 - 6x + 9 = 36

B. when x = 9, x^2 + 16x + 63 = 288

C. when x = 9, x^2 + 14x + 45 = 252

D. when x = 9, x^2 -12x + 27 = 0

Thank you,

MrB

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Dmitry [639]

Let's see what to do buddy...

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The sum of the angles of each n-sided figure is found in the following equation :

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The question's figure is 5-sindes figure

so the sum the angles equal :

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So we have :

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Subtract the sides of the equation minus 479

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