sara bought 14 things, some CDs and some books. the cds cost 11 dollars each and the books cost 10 dollars each. let z be the number of cds that sara bought.

Question

(A) give an expression (in terms of z) for the number of books Sara spent on books

(b) give an expression in terms of Z for the amount of money Sarah‘s spent on books

(c) give an expression in terms of Z for the amount of money Sarah spent on CDs

(d) give an expression in terms of Z for the total amount of money Sarah spent

(e) simplify your answer to Pryor part

Answer 1

z = number of cds

(a) number of books = 14 - z

(b) amount of money spent on books = 10 * (14 - z) = 140 - 10z

(c) amount of money spent on cds = 11z

(d) amount of money Sarah spent = 11z + 140 - 10z

(e) 140 + z