Which expression is equal to (7times2)times2

Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)