Aclassmate simplifies the expression in exercise 1. is the expression he wrote equivalent to the original expression? explain.
exercise 1: 14d - 9 - 21k - 7dk + 2
exercise 4: 7dk (2 - 3 - 1) - 7
the length of a book is 2.75 times greater than the width. write and simplify an algebraic expression for the perimeter of the box in terms of the width w.