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Citrus2011 [14]
3 years ago
6

Find the area of the trapezoid

Mathematics
1 answer:
Vladimir79 [104]3 years ago
7 0
Area = 1/2 x (a+b) x h

= 1/2 x ( 5+ 13) x 17
=1/2 x 18 x 17
= 153cm. (a and b are the two parallel lines. H is height.)
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Answer: Choice A

y = (-3/4)(x + 4) + 6

=====================================================

Let's go through the answer choices

  • Choice A is something we'll come back to
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  • Choice C is false for similar reasons as choice B. The slope should be negative.
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We've eliminated choices B through D.

Choice A must be the answer through process of elimination.

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If we started at a point like (0,3) and move to (4,0), note how the slope is -3/4

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We can also use the slope formula m = (y2-y1)/(x2-x1) to see this.

Then we pick on a point that is on the diagonal line. It could be any point really, but the point your teacher used for choice A is (x1,y1) = (-4,6)

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y - y1 = m(x - x1)

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