The circumference of a circle is 361 cm. What is the radius of the circle? A 18 cm B 72 cm C 34 cm D 36 cm

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:

options

2 over 5 and 4 over 15

don’t know last one sorry

step-by-step explanation: