wyattdawes45
12.10.2020 •
Mathematics
For the given situation: 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?
Select all the pairs that represent combinations of books that Derek can buy.
Group of answer choices
(2, 5)
(0,10)
(−2, 15)
(3, 5/2)
(1, 2/5)
Solved
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Ответ:
2*120 + 2*3.14*40 = 240 + 251.2 = 491.2;