Please help it's due today. Also please don't help if you don't know.​

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

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

The measure of an angle is 117°. what is the measure of a supplementary angle?