First of all you are going to want to google the way to solve that area of a triangle. Solve the triangles area. then find the area of the rectangle and add all of your answers to get the over all area.
A number x divided by -1 is at least -4.
x / -1 ≥ -4
Multiply both sides by -1.
x ≤ 4
Remember, when multiplying or dividing by a negative, you must change the sign's direction.
~Hope I helped!~
A and C are complementary
B is supplementary
In this case if x<100 George will be losing money. So he will only earn a profit when he sells more than 100 DVDs. Essentially (x-100) represents his break-even point.
