Nina and Jo both ran a 12 km race. Nina took 1 hour 15 minutes to run the whole race.
Jo started the race 6 minutes later than Nina but caught up when they had both travelled 9 km.
If Nina and Jo both ran at constant speeds, what is Jo's speed to 2 dp?

Acircular city park has a sidewalk directly through the middle that is 111 - feet long. if each bag of fertilizer covers 50 square feet, then determine how many bags of fertilizers the parks and recreation department needs to use to cover the circular park. ignore all the sidewalks around and through the park.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

If a || b and e || f , what if the value of y ?