If the average speed of a car is 45 km/hr, how far can it travel in 40 min?

If given an equation of a line such as -1/2x+6 how would you create an equation of a line parallel and perpendicula to this line that goes through another point such as (4,10)

Aiden drives to school and back each day. the school is 16 miles from his home. he averages 40 miles per hour on his way to school. if his trip takes 1 hour, at approximately what speed does aiden drive home?

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?