SOLUTION: my question is: the area of a trapezoid is A=(a+b)h .there is a line under that with a 2 under it. If A=300, h=5, and b=30, what is the value of a?

SOLUTION: my question is: the area of a trapezoid is A=(a+b)h .there is a line under that with a 2 under it. If A=300, h=5, and b=30, what is the value of a?

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Question 202129: my question is: the area of a trapezoid is A=(a+b)h .there is a line under that with a 2 under it. If A=300, h=5, and b=30, what is the value of a?
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
A=((a+b)h)/2
300=((a+30)5)/2
2*300=5a+150
450=5a
a=90
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