a and b are parallel because 114 = 66+48 = 114, these two angles are the same because they are alternate exterior angles, and they couldn't be the same if a and b are not parallel.
Answer:
There needs to be more information
Step-by-step explanation:
Answer:
Bill drove 210 miles on the interstate.
Step-by-step explanation:
The total distance of his travel was 225 miles and there were two types of road in the course, the town roads at which he drove "x" miles and the interestate road at which he drove "y" miles. Therefore:
x + y = 225
On the town he drove at 30 mph on average and on the interestate he drove at 70 mph on average. Therefore:
x/30 + y/70 = 3.5
We can now build a system of equations shown below:
x + y = 225
x/30 + y/70 = 3.5
Multiplying second equation by -30, we have:
x + y = 225
-x - (3/7)*y = -105
(4/7)*y = 120
y = 120*(7/4) = 210
x + 210 = 225
x = 225 - 210 = 15
Bill drove 210 miles on the interstate.