Question

the area of the trapezoid is A=0.5(b1+b2)h
find b1 if A=100 h=5 b2=12

Answer 1

substitute your information into the formula
\[100 = 0.5\times(b _{1} + 12)\times12..... 100 = 6\times(b _{1} + 12)\]

now solve for x

the first step is to divide both sides by 6

\[\frac{100}{6} = b _{1} + 12\]

I'll leave you to finish the calculations

Answer 2

oops should be b1 not x

Answer 3

kay thanx [: