Which expression has a value of 15 when n = 7 a. 43 - 5n b. 3n - 5 c. 6n - 28 d. 19 - 28/n

Average acceleration: i have no idea how to do this.

Angela is buying a dress that is on sale for 20% off. if the original price of the dress is $40.00, how much money is angela saving on the dress? a. $0.80 b. $3.20 c. $32.00 d. $8.00

The length of a rectangular piece of land is 92 yards more than three times its width. the perimeter is 760 yards. find its dimensions.