SOLUTION: The formula for the area of a trapezoid is A=1/2(b1+b2)h. Solve the formula for b1. The numbers next to the b's are supposed to drop down. Like the opposite of an exponent.

Algebra ->  Equations -> SOLUTION: The formula for the area of a trapezoid is A=1/2(b1+b2)h. Solve the formula for b1. The numbers next to the b's are supposed to drop down. Like the opposite of an exponent.      Log On


   

Question 188660This question is from textbook saxon algebra 2
: The formula for the area of a trapezoid is A=1/2(b1+b2)h. Solve the formula for b1. The numbers next to the b's are supposed to drop down. Like the opposite of an exponent. This question is from textbook saxon algebra 2

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
A=%281%2F2%29%28b%5B1%5D%2Bb%5B2%5D%29h Start with the given equation.


2A=%28b%5B1%5D%2Bb%5B2%5D%29h Multiply both sides by 2.


2A=h%28b%5B1%5D%2Bb%5B2%5D%29 Rearrange the terms.


%282A%29%2Fh=b%5B1%5D%2Bb%5B2%5D Divide both sides by "h".


%282A%29%2Fh-b%5B2%5D=b%5B1%5D Subtract b%5B2%5D from both sides.


%282A%29%2Fh-%28h%2Ab%5B2%5D%29%2Fh=b%5B1%5D Multiply b%5B2%5D by h%2Fh


%282A-h%2Ab%5B2%5D%29%2Fh=b%5B1%5D Combine the fractions.


So the solution is b%5B1%5D=%282A-h%2Ab%5B2%5D%29%2Fh