Helppp me pls! ASAP

To complete your spring schedule, you must add calculus and physics. at 9: 30, there are three calculus sections and two physics sections; while at 11: 30, there are two calculus sections and three physics sections. how many ways can you complete your schedule if your only open periods are 9: 30 and 11: 30?

Can (3,5 and square root 34) be sides on a right triangle?

Just tell me how to set up the equation.