Marissa got 60% of the questions correct on her quiz out of 40 total questions. How many questions did she get wrong?

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.

Ineed if you could explain and give me the answer you! this needs done

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?