Solve the system of linear equations by substitution. Y=2x
x +y =-9
The solution of the system is

Adaycare center charges a $75 enrollment fee plus $100 per week. which of the following represents the cost of sending a child to daycare for 14 weeks?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Examine this system of equations. what integer should the second equation be multiplied by so that when the two equations are added together, the x term is eliminated? 3/4x+1/7y=6 1/8x-3/5y=16