Just use the dirt method... Rate times time equals distance... Ok so it is traveling at a speed of 70 mph so that would be the rate (the speed). At first you don't know the distance but then it tells you in the end. So how many hours and minutes is it to get from 3:30 to 5:00? 2 hours and 30 minutes... So you just found the time. Then you times the rate/speed by the time and their you go! You get the distance!
The angles in a triangle always add up to exactly 180 degrees. To see if this can be a triangle, add up the given angle measures. If the sum is not 180, then it cannot be a triangle.
140+43+7=190
A triangle CANNOT have the angles measures as 140, 43, and 7.