How do you do this question? Im working from home and this is the teachers worked example.. with no workings on it Step by step, i need to know what to do for each question ( 1 - 3 )

Cara earns a base pay of $1800 per month at a car dealership plus a commission of 6% of her sales. what are caras total earning in a month in which she sells $40000 worth of merchandise

Match each expression with its simplified form.

Driving 75 mph, it takes alicia 2 hours to reach the airport to go on a vacation. it then takes her 4 hours to get to her destination with the jet traveling at a speed of 400 mph. how many miles does alicia travel to get to her destination?