Paisley needs to order some new supplies for the restaurant where she works. The restaurant needs at least 587 glasses. There are currently 307 glasses. If each set on
sale contains 20 glasses, which inequality can be used to determine x, the minimum
number of sets of glasses Paisley should buy?

a. 587 ≤ 20x + 307
b. 20(x+307) ≤ 587
c. 587 ≥ 20x + 307
d. 20(x+307) ≥ 587