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2 years ago

What is 6/10 plus 7/12? And please give me the estimate of the sum or difference. Thank you

1 answer:

8 0

6/10+7/12

=72/120+70/120

=142/120

=120/120+22/120

=1+22/120

=1+11/60

*Good estimate would be 1+1/6 = 1.17

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3 years ago

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3 years ago

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Step-by-step explanation:

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2 years ago

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Find an exact value. <img src="https://tex.z-dn.net/?f=cos%28-%20%5Cfrac%7B%20%5C77%20%5Cpi%20%20%20%20%7D%7B12%7D%29%20

xxTIMURxx [149]

$\cos\left(-\dfrac{7\pi}{12}\right)=\cos\dfrac{7\pi}{12}$

Recall that

$\cos^2x=\dfrac{1+\cos2x}2$

Let $x=\dfrac{7\pi}{12}$ , so that

$\cos^2\dfrac{7\pi}{12}=\dfrac{1+\cos\dfrac{7\pi}6}2=\dfrac{1-\dfrac{\sqrt3}2}2=\dfrac{2-\sqrt3}4$
$\cos\dfrac{7\pi}{12}=\pm\sqrt{\dfrac{2-\sqrt3}4}=\pm\dfrac{\sqrt{2-\sqrt3}}2$

Since the angle $\dfrac{7\pi}{12}$ lies in the second quadrant, you know that the cosine must be negative, so

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2 years ago

Find AR step by step pleaseeee

grandymaker [24]

if RD is 12cm so AR is 12cm too... since the R is placed in the middle and we can analyze too that the AD is 24cm since RD is 12cm and AR is 12cm so...

12+12=24

AR= 12cm

Hope it helps...

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2 years ago