Can someone help me please?

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account

Someone answer this asap for the length, in feet, of a rectangular rug is represented by the expression 5x² + 2x. the width, in feet, is represented by the expression 3x². which expression represents the perimeter, in feet, of the rug? a. 8x² + 2x b. 8x² + 4x c. 16x² + 2x d. 16x² + 4x