The area of a trapezoid is 75 in^2. If the height is 10 inches and one of the bases is 7 inches, find the length of the other base.

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?

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

25 ! the line of best fit is h = 5a + 86. predict the height at age 16.