Lisa is four years younger than her sister. Which expression stands for the sum of Lisa’s age and her sister’s age?

Coco has a jar containing pennies and nickels. There is $9.20 worth of coins in the jar. If she could switch the number of pennies with the number of nickels, there would be $26.80 worth of coins in the jar. How many pennies and nickels are in the jar?

Alice saved $2900. She saved $1567 less then her brother. How much did her brother save?

Adult movie tickets cost $12 each and student tickets are eight dollars each. What is the cost to buy a adult tickets and S student tickets?

In golf, scores that are under par for the entire round are shown as negative scores; positive scores are shown for scores that are over par, and 0 is par.  Austin Ernst was the winner of the 2014 Portland Classic in Oregon. Her scores were -3, -3, -3, and -5. Whatwas her overall score?

Plumber Joe charges a flat fee of $55 plus $40 per hour, while Plumber Bob charges a flat fee of $35 and $45 per hour.  What is the expression in terms of hours worked for the total by each plumber?