The Dimensions (Length & Width) of a rectangle are (x-7) inches and (x + 5) inches respectively. a) What is the polynomial that represents the area (Standard or Factored Form)?

b) Find the area of the rectangle when x = 10 inches

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

What properties allow transformation to be used as a problem solving tool

Math it's appreciated. (picture provided)