Molly drove 50 miles to her grandmother house the trip took her 2 hours what was her average speed in miles per hour

Well if it was in 2 hours we can start by dividing both numbers by two because we want to find the average PER mile so
50/2 = 25
2/2 = 1
(we are just simplifying)
so if it took her 1 hour to drive 25 miles
her average speed would be 25 milers per hour
or 25miles/hour

There is 240 red cars and there is 400 blue cars because 240/3=80 and 80*5=400