The circumference of a circle is 14 π π cm. Find its radius, in centimeters

7 = r

Step-by-step explanation:

The circumference of a circle is given by

C = 2 * pi *r

14 pi = 2 * pi *r

Divide each side by 2 pi

14 pi/ (2 pi) = 2 * pi *r / (2 pi)

7 = r

b.my answer is b.

brainliest

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