Combining functions i need this so I can finish summer school​

Strawberries cause two hours per pound kate buys 5 pounds he gets 20% off discount on the total cost how much does kate pay for the strawberries

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

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal