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3 years ago

14

Dawson rakes leaves in his neighborhood. The equation y = 10x represents the amount of money he earns. What is the constant of p

roportionality? A. 1 C. 10 B. 5 D. 20

1 answer:

Valentin [98]3 years ago

3 0

The constant of proportionality is equal to k in y=kx. In y=10x, the k value is 10.

Final answer: C. 10

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Step-by-step explanation

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3 years ago

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2 years ago

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Pre-Cal - Someone please help! (Image Attached)

olasank [31]

Note that $\displaystyle{ \sin30^{\circ}= \frac{1}{2}$ and $\displaystyle{ \cos30^{\circ}= \frac{ \sqrt{3}}{2}$ .

From the unit circle, we can check that $\sin30^{\circ}$ and $\sin(-30)^{\circ}$ have the same value, but opposite signs, that is:

$\sin(-30)^{\circ}=-\sin(30)^{\circ}=-\frac{1}{2}$ .

Thus,
$\displaystyle{ \cos(x-y)= \cos(-30^{\circ}-60^{\circ})=cos(-90^{\circ})$ .

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Answer: 0

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3 years ago