SOLUTION: solve for b A=1/2h(B+b) Area of Trapezoid also solve for b A=1/2(16)(20+b)

Algebra ->  Equations -> SOLUTION: solve for b A=1/2h(B+b) Area of Trapezoid also solve for b A=1/2(16)(20+b)       Log On


   

Question 84810: solve for b
A=1/2h(B+b) Area of Trapezoid

also solve for b
A=1/2(16)(20+b)
Answer by funmath(2933) About Me  (Show Source):
You can put this solution on YOUR website!
solve for b
A=1/2h(B+b) Area of Trapezoid
This is one way to do it, some people would rather distribute first, but I don't.
2A=2%281%2F2%29h%28B%2Bb%29
2A=h%28B%2Bb%29
2A%2Fh=%28h%2Fh%29%28B%2Bb%29
2A%2Fh=B%2Bb
2A%2Fh-B=-B%2BB%2Bb
2A%2Fh-B=b
highlight%28b=2A%2Fh-B%29
also solve for b
This time I will distribute first.
A=1/2(16)(20+b)
A=8%2820%2Bb%29
A=160%2B8b
A-160=-160%2B160%2B8b
A-160=8b
%28A-160%29%2F8=8b%2F8
%28A-160%29%2F8=b
highlight%28b=%28A-160%29%2F8%29
Happy Calculating!!!