I really need help this is due today

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

Typically a point in a three dimensional cartesian coordinate system is represented by which of the following answers in the picture !

Yvaries inversely as x. y =12 when x=5. find y when x=4