Find the solution to the following system by substitution
3x + y = 30
y = 3x

What is the area of mnp? 40 m2 60 m2 68 m2 127.5 m2

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

How do you solving the solution of each system using elimination?