I cant see the link ummmmmm
22.5 miles
You would create a proportion based on the given information, then cross multiply and solve for the number of miles 1 gallon of gas can go.
x + 47 = 92. <--- x represents the number of 3rd graders
x +47-47 = 92-47
x=45
There are 45 third grader. Hope this helped!
It is said the blue card is a rectangle, so you don’t have to minus the inside rectangle. :)