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3 years ago

Evaluate (-5)^2 10 -10 25 -25

Mathematics

2 answers:

Lady bird [3.3K]3 years ago

5 0

Answer: C) 25

Because if you multiply -5 × -5 = 25
The negative sign goes away

elena55 [62]3 years ago

5 0

Answer:

Hey!

Your answer is 25!

Step-by-step explanation:

When we see (-5)^2 it means we multiply -5 by -5

(-5 x -5)

When you multiply two negatives, it becomes a positive!!

So we now see this as 5 x 5 which gives you 25!!

HOPE THIS HELPS!!

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Find the exact value of cos(sin^-1(-5/13))

son4ous [18]

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$\bf \textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies \pm\sqrt{c^2-b^2}=a \qquad \begin{cases} c=hypotenuse\\ a=adjacent\\ b=opposite\\ \end{cases} \\\\\\ \pm\sqrt{13^2-(-5)^2}=a\implies \pm\sqrt{144}=a\implies \pm 12=a \\\\[-0.35em] ~\dotfill\\\\ cos\left[ sin^{-1}\left( -\cfrac{5}{13} \right) \right]\implies cos(\theta )=\cfrac{\stackrel{adjacent}{\pm 12}}{13}$

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3 years ago

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