Which of the rrr-values satisfy the following inequality?
\dfrac r3+5\leq 8
3
r

+5≤8start fraction, r, divided by, 3, end fraction, plus, 5, is less than or equal to, 8
choose all answers that apply:
choose all answers that apply:

(choice a)
a
r = 9r=9r, equals, 9

(choice b)
b
r = 12r=12r, equals, 12

(choice c)
c
r = 15r=15r, equals, 15
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