Answer:

Step-by-step explanation:
b = h = Base = Height of triangle = 
Area of one triangle

There are 4 colored triangles so total area of the triangles is

The area of the colored triangles is 
1. In each graph, the two lines are parallel to each other.
2. Each set of equations have the same slope.
3. Equations that have the same slope as each other will always be parallel to each other.
Her brother joe made $52.08. First you need to make the percent into a decimal, like this 86% => .86. Then multiply .86 to $28. After that add what you got to $28.