Tina has a pet sitting business. She charges a flat service fee of $30, plus $15 per day for each animal. If one of her customers spent less than $150 on one animal, which of the following inequalities could be used to solve for x, the number of days the customer paid for pet sitting?

Answer 1

30 + 15 x < 150

15 x < 120

x < 8

Answer 2

Jack walked from school to his house at a rate of 240 ft/min. His sister Jill left school 2 minutes after Jack, walking home at a rate of 360 ft/min. How long after Jack leaves school does Jill catch up to him?

Answer 3

Jack walks time t
Jill walks time (t-2)
both walk distance d
d = 240 t
d = 360 (t-2)
so
240 t = 360 t - 720
120 t = 720
t = 72/12

Answer 4

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