Solve by graphing.
x + 3y = -9
5x + 3y = 3 ​

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

Melody received $140 at the end of a certain week. how many customers did she advise that week?

Ijump serves waffles, pancakes or french toast for breakfast. in addition, there are 14 syrups from which to choose. the meal comes with the choice of chocolate chips, strawberries or no topping. how many different breakfasts are possible at ijump?