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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OpenStudy (anonymous):
A. 2.5 inches
B. 71 inches
C. 34.25 inches
D. 27 inches
OpenStudy (anonymous):
@Callisto
OpenStudy (callisto):
|dw:1361590013477:dw|
OpenStudy (anonymous):
44*13?
OpenStudy (callisto):
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?
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OpenStudy (anonymous):
area=318.5
318.5=(x+22)x heoght 2 do i go from there?
OpenStudy (anonymous):
ahhh i can awnser its to hard >.<
OpenStudy (callisto):
What is the height?
OpenStudy (anonymous):
13inc
OpenStudy (callisto):
So, you get
318.5 = (x+22) x13
Do you know how to solve it?
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OpenStudy (anonymous):
yes
OpenStudy (anonymous):
32.5
OpenStudy (anonymous):
thx a lot
OpenStudy (anonymous):
wait dont i do (13x+286)
OpenStudy (callisto):
318.5 = (x+22) x13
You can first divide both sides by 13, then subtract 22 from both sides.
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OpenStudy (anonymous):
ohh ok
OpenStudy (anonymous):
2.5
OpenStudy (anonymous):
mind helping with 2 more?
OpenStudy (anonymous):
Quadrilateral MATH is a square. If MA = 2x – 5 and AT = x + 10, find the perimeter of the square