51 is 85% of what number?
a) 1.67
b) 51
c) 60
d) 43.35

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.

Me because some of question i don’t understand

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?