Please help me with this question, and show working.

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Which polygon is she in the process of constructing ?