What is the opposite of the opposite of -5?

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

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

Which of these triangle pairs can be mapped to each other using a single translation? cof hn