Which one of the following statements expresses a true proportion?
a. 2 : 3 = 3 : 2
b. 3 : 5 = 12 : 20
c. 14 : 6 = 28 : 18
d. 42 : 7 = 6 : 2

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

If you flip a coin 3 times, what is the probability of flipping heads 3 times? a. p(3 heads) = 3/8 b. p(3 heads) = 1/6 c. p(3 heads) = 1/8 d. p(3 heads) = 1/2