What should I do here

You are doing radius and diameter maths, so you have 2 circles with equivalent radiuses so that would mean you would use pi to solve for these radiuses which will result in solving both :)

Step-by-step explanation:

5x + 5

step-by-step explanation:

you should always add the diagrams and graphs we cannot see. this particular question is kind of borderline because we can make a graph for you.

(f + g)x = -x^2 +3x + 5 + x^2 + 2x

(f + g)x = 5x + 5

the graph of z = 5x + 5 is shown below. always use desmos when in doubt.

answer: translate the circles so they share a common center point and dilate circle y by a scale factor of 3.