Elaine drives her car 180 miles and has an average of a certain speed. If the average speed had been 5mph more, she could have traveled 200 miles in the same length of time. What was her average speed?
+36916 180 m / x m/hr = 200 / (x+5)
cross multiply
180x + 180(5) = 200x
x = 45 m/hr for 180 miles
+36916 180 m / x m/hr = 200 / (x+5)
cross multiply
180x + 180(5) = 200x
x = 45 m/hr for 180 miles
