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lianna [129]
3 years ago
8

Simplify. 8.2 - (-14.1)​

Mathematics
2 answers:
adell [148]3 years ago
7 0

8.2 - ( - 14.1)

8.2 + 14.1

22.3

option D 22.3 is correct answer friend

ExtremeBDS [4]3 years ago
5 0
I think it’s -5.9
Idk if it wrong though
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In this scenario, we know that the area is 45cm^2 and the base is 2h+12 (since it is twice it’s height plus twelve). We can plug this into the area equation and then proceed to solve out accordingly.
a=1/2b(h)
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h^2 + 6h - 45 = 0.

Now plug into the quadratic formula (with a=1, b=6, and c=-45) as shown in the image below.

After plugging the equation in and solving, we come to the idea that h is roughly equal to 4.34. We can now plug this back into the triangle area formula to solve out for b.
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<span>you get

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