How do i put that on a line?please help me.

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)