Iam struggling on how to rationalize the denominators and simplify the problem.

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

Can someone me with this graph problem by the way i need to know the answers by today since this assignment is due ! !

Jessie and bob are financing $425,500 to purchase a house. they obtained a 30/8 balloon mortgage at 6.55%. what will their balloon payment be?