JanaMiqdad7702
06.11.2020 •
Mathematics
Part A: Derek has $20 to spend on used books. Hardcover books cost $5 each and paperbacks cost $2 each. Complete the equation which determines the number x of hardcover books and the number y of paperback books he can buy.
Part B: For the situation in Item 14, which of the following represents a possible combination of books that Derek can buy? Select all that apply.
Options for part b:A. (–2, 15)
B. (0, 10)
C. (2, 5)
D. (3,5/2)
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Ответ:
2
Step-by-step explanation:
Compare y = 2x to y = kx, where y = kx is a proportional relationship.
We see that the constant of proportionality, k, is 2.