Question 858226
Mr. Reed drives 35*4.5 before Mrs. Reed begins.  He has a headstart of 157.5 miles.
After the first hour she has driven, Mr:192.5; Mrs:50
Second hour: 227.5; 100
Third: 262.5, 150
Fourth: 297.5, 200
Fifth: 332.5, 250
Sixth: 367.5, 300
Seventh: 402.5, 350
Eight: 437.5, 400
Ninth: 472.5, 450
Tenth: 507.5, 500
(half an hour = 525, 525)
Eleventh: 542.5, 550
.
Mathematically,
157.5 + 35x = 50x
Subtract 35x from each side
157.5 = 15x
Divide each side by x
10.5 hours = x