A store can buy 8 cartons of milk for $24 dollars or 7 cartons of milk for $28. How much less does each carton of milk cost if the store buys 8 cartons instead of 7 cartons?

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2