Find the area of the irregular figure. 5 in.
4 in
A = [? ]in?
5 in.
9 in.
12 in.
4 in.
5 in.

What is the area of the trapezoid shown ?

Aquadratic equation in standard from is written ax^2= bx+c, where a, b and c are real numbers and a is not zero?

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.