Algebra help me thank you

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?