Circumference of a circle is 18Pi inches. What is the area of the circle?

81pi or 254.34 inches square

Step-by-step explanation:

18pi = 2pi*r

pi*r = 9pi

r = 9

pi*(9)^2 = 81pi = 254.34 inches square

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

9x