If the volume of a sphere is 36 pi cubic inches, what is the radius?​

r = 3 in

Step-by-step explanation:

The volume (V) of a sphere is calculate as

V = πr³ ( r is the radius )

Here V = 36π , then

πr³ = 36π ( multiply both sides by 3 to clear the fraction )

4πr³ = 108π ( divide both sides by 4π )

r³ = = 27 ( take the cube root of both sides )

r = = 3

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