Reaper534

The height of a trapezoid is 13 inches, one of the bases measures 22 inches. If the area of the trapezoid is 318.5 square inches, find the length of the other base.

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Reaper534

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A. 2.5 inches
B. 71 inches
C. 34.25 inches
D. 27 inches

Reaper534

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@Callisto

Callisto

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|dw:1361590013477:dw|

Reaper534

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44*13?

Callisto

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Let x be another base
area = (x + 22) x height /2
You have area and height. Can you plug in the numbers there and solve for x?

Reaper534

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area=318.5
318.5=(x+22)x heoght 2 do i go from there?

Reaper534

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ahhh i can awnser its to hard >.<

Callisto

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What is the height?

Reaper534

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13inc

Callisto

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So, you get
318.5 = (x+22) x13
Do you know how to solve it?

Reaper534

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yes

Reaper534

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32.5

Reaper534

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thx a lot

Reaper534

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wait dont i do (13x+286)

Callisto

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318.5 = (x+22) x13
You can first divide both sides by 13, then subtract 22 from both sides.

Reaper534

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ohh ok

Reaper534

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2.5

Reaper534

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mind helping with 2 more?

Reaper534

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Quadrilateral MATH is a square. If MA = 2x – 5 and AT = x + 10, find the perimeter of the square

Reaper534

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can u help?

Kris123

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Well you set 2x-5=x+10