A book costs $45. Sales tax on the book is 7%. Write two

Last updated: 8/7/2022

A book costs $45. Sales tax on the book is 7%. Write two different expressions that represent the final cost of the book in dollars. One of the expressions should use only a single multiplication and no other operations. A cake that costs $32 is on sale for 15% off and there are no taxes. Explain why the expression (0.85)-32 represents the final price of the cake in dollars