Beth, Manuel, and petra are collecting sponsors for a walk a thon. The equation y=20x represents the amount of money Beth raises for walking x miles. Petra will earn $15 for each mile she walks. What quantities should you use to find the unit rate

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

a reflection across the x axis and a 90 degree rotation left and right.

sorry i really don't know what tiles and steps you are referring to

step-by-step explanation: