Question

A school had to buy 27 new science books and it ended up costing $630.72 total. Write an equation that can be used to express the relationship between the total cost(t) and the number of books (b) purchased.

Answer 1

The equation that expresses the relationship between the total cost (t) and the number of books (b) purchased is t = 23.36b.

Step-by-step explanation:

To express the relationship between the total cost (t) and the number of books (b) purchased, we can use the equation t = b*c, where c represents the cost of each book. In this case, we know that the school bought 27 books and the total cost was $630.72, so we can substitute these values into the equation:

t = 27*c

630.72 = 27*c

To solve for c, we divide both sides of the equation by 27:

c = 630.72/27 = $23.36

Therefore, the equation that expresses the relationship between the total cost (t) and the number of books (b) is t = 23.36b.