Which one of the following statements expresses a true proportion?

a.) 42 : 7 = 6 : 2

b.) 14 : 6 = 28 : 18

c.) 2 : 3 = 3 : 2

d.) 3 : 5 = 12 : 20

Simplify -4z+2y-y+-18z a.-22z+y b.-14z+2 c.3y+22z d.y +14z

Afair die is cast four times. calculate the probability of obtaining exactly two 6's round to the nearest tenth of a percent

Afitness center has 2 membership plans one has a low dollar sign up fee of 15 dollars and costs 38 dollars per month to join. a second plan has a higher sign up fee of 78 dollars but a lower monthly fee of 31 dollars for what number of days of the month is the coat the same