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3 years ago

I’m not sure if it’s A, C, or D can someone help?

Mathematics

1 answer:

Paladinen [302]3 years ago

4 0

It’s C

All you have to do is subtract the fee ($10) from what she paid ($70) which equals $60. Then you just divide 60 by 7.5 to get 8 hours

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Over the interval [0,2pi), what are the solutions to cos(2x) = cos(x)? check all that apply

kykrilka [37]

$\cos(2x) = \cos(x)$

Solution (1)

$2x = x + 2k\pi$

$2x - x = 2k\pi$

$x = 2k\pi$

for k=0 / for k=1 / for k=-1

x=0 / x=2π / x=-2π

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solution (2)

$2x = - x + 2k\pi$

$2x + x = 2k\pi$

$3x = 2k\pi$

$x = \frac{2k\pi}{3}$

for k=0 / for k=1 / for k=-1

x=0 / x=2π/3 / x=-2π/3

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Note that i'm trying values of K which make the answer belong to our interval;

So our solution which i will represent as a set is;

S € {0,2π/3,2π}

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2 years ago

Keith earns $37.00 in 4 hours. How much would he earn in 11 hours?

Leona [35]

Answer:

Step-by-step explanation:

37/4= 9.25

9.25*11 =101.75

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2 years ago

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Ashton made contributions to a Roth IRA over the course of 32 working years. His contributions averaged $2,400 annually. Ashton

enyata [817]

The formula of the future value of an annuity ordinary is
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3 years ago

What is the solution set of the following equation?

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$-8x + x + 15 = -7x + 12\\\\-8x+x+7x=12-15\\\\0=-3\\\\x\in\emptyset$

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2 years ago

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serg [7]

7/1, I think that’s right

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