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3 years ago

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Jay earns $8 an hour when he works at his uncle’s store. He earns $9 an hour when he does yard work for his neighbor. Which expr

ession represents the total amount he will earn in a week when he works u hours at his uncle’s store and v hours doing yard work for his neighbor?

2 answers:

photoshop1234 [79]3 years ago

6 0

The answer is A. 8u+9v!!!

Hope this helps!!!:)

anygoal [31]3 years ago

3 0

Answer:

8u+9v

Step-by-step explanation:

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We know that,

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Therefore,

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Substituting these values in eqn 1

$\cos (x+2 x)=\cos x\left(\cos ^{2} x-\sin ^{2} x\right)-\sin x(2 \sin x \cos x)$ -------- eqn 2

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Applying this in above eqn 2, we get

$\cos (x+2 x)=\cos x\left(1-2 \sin ^{2} x\right)-\sin x(2 \sin x \cos x)$

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Option A is correct

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