Question

An online retailer is selling used books for $5.49 and you have $40 to spend. How many books can you buy if you must pay 8.5% sales taxes and an additional 10% of the total purchase price (with tax) for shipping?

Answer 1

Answer: He can buy 6 books

explanation: 8.5% of 5.49 is 0.46.  10% of 5.49 is 0.54.  0.54 + 0.46 is $1.00

5.49 + 1.00 = 6.49,  40 divided by 6.49 is 6.16 books, but because you cant buy a 16th of a book, he can only buy 6 books.

Answer 2

The person can buy 6 books in the amount he has.

What is an Equation?

An equation is a mathematical statement that is formed when two algebraic expressions are equated using an equal sign.

The amount at which the retailer is selling books is $5.49

The amount the person has for buying books $40

The total amount that the person has to pay for the book is the sum of the rate and the sales tax and the shipping charge

The cost of buying one book = x ,then,

x = 5.49 + (10% of 5.49) + (8.5% of 5.49)

x = 5.49+0.549 + 0.4665

x = $6.5055

Let y be the total books he can buy then the equation is

y = $40 / x

y = 40 / 6.5055

y should be a whole number so,

y =6

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