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3 years ago

7

Solve for x.A. x =9B. x = 3C. x = 4D. x = 27

1 answer:

meriva3 years ago

8 0

Your formula for this is $9^{2} =x(24+x)$ and $81=24x+ x^{2}$ . Get everything on one side of the equals sign, set it equal to 0 and factor. When you do this you get (x-3)(x+27). The Zero Product Property rule tells us that either x-3 = 0 or x+27 = 0 and that x = 3 and -27. The only thing in math that will NEVER be negative besides time is distance/length, therefore, x cannot be 27 and has to be 3.

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Hence Option A is true

Confidence interval is $0.071,1.928$

4 0

3 years ago