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2 years ago

Please help me in math

Mathematics

1 answer:

Marta_Voda [28]2 years ago

3 0

When we have negative exponents, we can move the term with the exponent to the bottom of the fraction. This is also known as multiplying by the reciprocal (and changing the negative exponent to be positive!).

The reciprocal of z^-3 would be 1 / z^3.

Hope this helps!! :)

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Part 1:

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Part 2:

Option d 37.1 cm

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We need to use the pythagorean theorem.

In part 1, if the 3 side lengths are a right triangle, then, they must verify:

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$\begin{gathered} 7.5^2=56.25 \\ 4.5^2+6^2=20.25+36=56.25 \end{gathered}$

They're equal, then the lengths correspond to a right triangle.

For part 2, we need to use again the theorem. In this case:

$\begin{gathered} 12^2+x^2=39^2 \\ x=\sqrt{1521-144} \\ x=\sqrt{1377} \\ x\approx37.1cm \end{gathered}$

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