Compute the following volume and surface area. a rectangular solid has sides of 7 cm, 9 cm, and 11 cm. what is its surface area?
251 square centimeters.
693 square centimeters.
478 square centimeters.

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

the answer is 24

step-by-step explanation:

step-by-step explanation: