The hardcover version of a book weighs 7 ounces while its paperback version weighs 5 ounces. Forty-five copies of the book weigh a total of 249 ounces. Weight of Books Number of Books Weight per book (ounces) Total Weight (ounces) Hard Cover h 7 7 h Paperback 45 minus h 5 x Total 45 249 Which value could replace x in the table?
Answer
A
40 minus h
B
5 times 45 minus h
C
50 minus h
D
5 times open paren 45 minus h close paren
Explanation
There are 45 books altogether, and h of them are hardcover, so the number of paperbacks is 45 − h. Each paperback weighs 5 ounces, making their total weight x = 5(45 − h). Choice D gives that expression; choice B does not group 45 − h together.
AI-written and checked against the verified answer.