Question

question #6
christopher spent a total of $52.50 at a bookstore. he purchased a calendar for $9 and three books. each cost the same amount.
which of the following equations could be used to find b, the amount of each book he purchased?
a 3 + b + 9 = 52.50
b 12b = 52.50
c 3b + 9 = 52.50
d 3b - 9 = 52.50

Explanation:

Step1: Analyze the problem

Christopher spent a total of $52.50. He bought a calendar for $9 and 3 books, each costing $b. So the total cost is the cost of the calendar plus the cost of the 3 books.

Step2: Formulate the equation

The cost of the 3 books is \(3b\) (since each book is \(b\) dollars and there are 3 books), and the calendar is $9. So the total cost equation is \(3b + 9 = 52.50\), which matches option C.

Answer:

C. \(3b + 9 = 52.50\)