What's is the radius?

Step-by-step explanation:

So you have a circle right. The circle is going to have a center point. The diameter of the circle is the length from a side of the circle to the other side that passes through this center point. The radius is half of the diameter. This means that its basically a line starting at the center point and reaches to one side of the circle. In the picture, the diameter is the red line. The radius is half of that red line.

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

none of these

step-by-step explanation:

23 + 34 add up to 57 so just inform the teacher of this really stupid mistake