220 miles in 4 h = 55 mph multiply this by 5280 to get feet per hour then divide this by 60 to get ft/min
Exactly the same as you would do to simplify any other fraction . . .
divide top and bottom by their greatest common factor.
The greatest common factor of 77 and 84 is 7 .
Here is one method.
For each equation, first, let x = 0 and solve for y. that gives you one ordered pair. Plot that point. Then let y = = and solve for x. That gives you another ordered pair. Plot that point. Then draw a line that goes through those two points. Once you do this for both equations, if the lines intersect, the point of intersection is the solution.
