Selena is driving to visit her grandma who lives 325 miles away from she travels at an average speed of 60miles determine the independent and dependent quantites

The dependent is the average, 60 mph because it depends on Grandma's 325 miles from home; and the independent is 325 miles.

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

step-by-step explanation:

de-gf

hj=3x+20

ji=15x-64