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Blizzard [7]
3 years ago
7

Really need help

Mathematics
1 answer:
Ket [755]3 years ago
4 0
3n - 80 = 5n + 8\\3n=5n + 88\\ -2n = 88\\\\ n = -44
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The perimeter of a rectangle is 28.8 centimeters. The length of the rectangle is twice as long as it’s with. Find the length and
Mazyrski [523]

Answer:

Length=9.6 cm\\\\Width=4.8 cm

Step-by-step explanation:

Length=2*Width

L=2*W

Perimeter=28.8 cm

Perimeter of a rectangle= 2(Length+Width)

28.8=2(2W+W)\\\\28.8=2(3W)\\\\3W=28.8/2\\\\3W=14.4\\\\W=14.4/3\\\\W=4.8 cm\\\\

Length=2*Width\\\\=2*4.8\\\\=9.6 cm\\\\

Length=9.6 cm\\\\Width=4.8 cm

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Step-by-step explanation:

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Savatey [412]

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Step-by-step explanation:

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3 years ago
What is the y-value for f(x) = cos(x) when x = 180°?<br> -1<br> 0<br> 1/2<br> 1
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You start at 0 on the unit circle the cos of 0 =1, but at cos 0 there is no angle at all so there is no y value so at cos 0 y=0, 180 is the opposite direction of the starting point which is 0 so the x value of cos180= -1 but there is still no upward or downward angle ie.. y value. so the y value = 0 at 0 and 180. answer is 0
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