What is the inverse function of y=5x + 1

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Find the area of the unshaded square