Whats the inverse function of y=5x-10

If myesha works overtime, she gets paid "time and a half" for every hour she works. in other words, for every hour over 40 hours myesha works each week, she gets her hourly pay plus half her hourly pay. what is myesha's pay per hour when she works overtime?

Anyone know? is appreciated! will mark brainliest if correct!

Use the squared identities to simplify sin^2x cos^2x