Please help this is about be getting a 4/4 in my math class now I have 3/4 I want to get 4/4 please help...

Katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress?

Can (2,3 and square root 10) be sides ona right triangle?

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.