Two cars drive from town A to town B at constant speeds.the blue car travel 35 miles per hour, and the red car travels 70 miles per hour. the blue car leaves at 10:30, and the red car leaves at noon. the distance between the two towns is 140 miles. which linear equations represents the red car and the blue car? 
 a)red car y=70x
 blue car y=35x+52.5
 b)red car y=35x 
 blue car y=70x 
 c)red car y=70x 
 blue car y=35x 
 d) red car y=70x+105 
 blue car y=35x