Question

A book store focuses on selling sets of books and blank newspaper. each set contains x number of books and y number of journals. books are $15 each and journals are $7 each.write an algebraic expression to represent the situation

Answer 1

Let S be the cost of a set of books and journals.

Since the cost of each book is $15, then for x books the cost will be 15x.

Since the cost of each journal is $7, then for y journals the cost will be 7y.

The cost of the set will be the sum of the cost of x boks and y journals.

Therefore:

`S=15x+7y`

Which is an algebraic expression that represents the situation.