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Yuliya22 [10]
2 years ago
9

Can someone help me?

Mathematics
2 answers:
Marina86 [1]2 years ago
8 0
M = -3, hope it was helpful! :)
Pani-rosa [81]2 years ago
5 0

Answer: m=−3

Step-by-step explanation: −40−2(3m+1/2)=7m−2

−40+(−2)(3m)+(−2)(1/2)=7m+−2

−40+−6m+−1=7m+−2

(−6m)+(−40+−1)=7m−2

−6m+−41=7m−2

−6m−41−7m=7m−2−7m

−13m−41+41=−2+41

−13m/−13=39/−13

m=−3

What mistake I guess Keith did make is he subtracted 2 from -39 which equaled to -37 which caused him divide -37 by 13 when it should have been 39 divided by 13 because he should have left 39 alone and not have subtracted 2 from it also it should not have been negative basically what I'm trying to say is that he did his division and subtraction wrong.

 

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The height of a triangular window is 3 feet less than its base. The area the window is 20 ft.? find the dimensions of the window
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Let us assume base of the window = b feet.

Height is 3 feet less than base, that is = (b-3).

Given area of the triangle = 20 feet square.

We know formula for area of a triangle:

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Plugging values in formula, we get

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<h3>Therefore, base of the triangle = 8 feet and height = 8 -3 = 5 feet.</h3>
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i hope i was correct and helped if not you can go ahead and delete my answer:)
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