Someone please help me answer this

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

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

Solve the triangle. a = 21°, c = 105°, c = 5