The equation d=3t represents the relationship between the distance (d) in inches that a snail is from a certain rock and the time (t ) in minutes. how far will the snail be from the rock after 9 minutes?

Which expression is equivalent to? assume x > 0 and y > 0.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.