HELP ASAP LOL FREE POINTS 2+2+2+2+2+2+2+2+2+2+266+6+6+6+6+6+6 +5+5+9+9+9+9+7

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

To decrease an amount by 16% what single multiplier would you use

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.