3 years ago

PLEASE PLEASE HELP PLEASE PLEASE

Mathematics

1 answer:

Lilit [14]3 years ago

7 0

Answer:

14.8

Step-by-step explanation:

The Pythagorean theorem applies.

... x² = 7² + 13² . . . . . the square of the hypotenuse is the sum of the squares of the legs

... x² = 218

... x = √218 ≈ 14.8

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Part 2) $a=-\frac{1}{4c^{-6}}$

Step-by-step explanation:

Part 1) we have

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$b=-\frac{1}{2}c^{-2}$ ----> equation B

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Part 2) we have

$a=2b^{3}$ ----> equation A

$b=-\frac{1}{2c^{-2}}=-\frac{c^{2}}{2}$ ----> equation B

substitute equation B in equation A

$a=2(-\frac{c^{2}}{2})^{3}$

Applying property of exponents

$(x^{m})^{n}=x^{m*n}$

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$a=-\frac{c^{6}}{4}$

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