Solve the system by substitution.
y = -x
y = - 4x + 12

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

Two trains leave stations 546 miles apart at the same time and travel toward each other. one train travels at 95 miles per hour while the other travels at 115 miles per hour l. how long will it take for the two trains to meet