What is the answer to this? 2y - 7 + 4 - y (pre algebra)

On an airplane there are two seats on the left side and three seats on the right side there are 90 seats o the right side of the plane

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.