I know this is easy but can someone answer this ?

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?

Find the inverse of the given function. f(x)= -1/2sqr x+3, x greater than or equal to -3

Which of the following polynomials is the expansion of (* x - y)4?