document.write( "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? \n" ); document.write( "
Algebra.Com's Answer #152443 by rfer(16322)\"\" \"About 
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A=((a+b)h)/2
\n" ); document.write( "300=((a+30)5)/2
\n" ); document.write( "2*300=5a+150
\n" ); document.write( "450=5a
\n" ); document.write( "a=90
\n" ); document.write( "
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