There are 20 boys in the class. The ratio is 4:3 so that means 4 out of 7 are boys and 3 out of 7 are girls. Divide 35 by 7 and you get 5. 5 times 4 is 20. 5 times 3 is 15. add them together and you have 35 students in total. So 20 students are boys and 15 students are girls.
(x+7, y-3)
To move from the theater to Sam you would move right 7 units and down 3 units.
The length of the trail is 98.5 KM, all you need to do is divide the total distance by the number of times she went on it.
