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lora16 [44]
3 years ago
6

Please answer quick I need to get this for my mock test​

Mathematics
2 answers:
Ulleksa [173]3 years ago
5 0
I think 64.29 bc 90 percent of 500 is 450 so i did 450 percent of 700
QveST [7]3 years ago
4 0
The answer would be 126 choose any steps you want that I will write now....

First steps:

- 90/500 = x/700
- 18/100 = x/700
- x = 18.7 = 126

Another steps:

- 700/500 = 7/5
- ( 7/5) • 90 = 7•90 / 5 = 7.18 = 126
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Observe that

\sin\left(\dfrac\pi6-v\right)=\sin\dfrac\pi6\cos v-\cos\dfrac\pi6\sin v=\dfrac12\cos v-\dfrac{\sqrt3}2\sin v

In the original equation, divide both sides by \dfrac12:

-\sqrt3\sin v+\cos v=\sqrt3\implies\dfrac12\cos v-\dfrac{\sqrt3}2\sin v=\dfrac{\sqrt3}2

\implies\sin\left(\dfrac\pi6-v\right)=\dfrac{\sqrt3}2

Next,

\sin x=\dfrac{\sqrt3}2\implies x=\dfrac\pi3+2n\pi,x=\dfrac{2\pi}3+2n\pi

where n is any integer. Then

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Fix n=0 to ensure -\pi, so that

v=-\dfrac\pi6,v=-\dfrac\pi2

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4 years ago
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Step-by-step explanation:

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