14. derek has $20 to spend on used books. hardcover books cost $5 each and paperbacks cost $2 each. what…
14. derek has $20 to spend on used books. hardcover books cost $5 each and paperbacks cost $2 each. what equation in standard form determines the number x of hardcover books and the number y of paperback books he can buy?
Answer
Explanation:
Step1: Calculate cost of hardcover books
The cost of (x) hardcover books is (5x) dollars.
Step2: Calculate cost of paperback books
The cost of (y) paperback books is (2y) dollars.
Step3: Set up the equation
The total amount Derek can spend is ($20). So, the equation is (5x + 2y=20).
Answer:
(5x + 2y = 20)