Math help

1) During a recent IndyCar road course race, the winners average speed was 118 mph. Based on this speed, how long would it take an IndyCar driver to travel Los Angeles to New York City, a distance of about 2810 miles by road, without stopping? Round to the nearest tenth of an hour.

2) Solve equations by the substitution method:

2y=x+2

6x-12y=0

3) Of the 12360 freshmen entering county college, 2000 are enrolled in prealgebra. Find the percent of entering freshmen who are enrolled in prealgebra. Round to the nearest whole percent.