(x+3)y=14 which ordered pair is a solution to this equation ? a. 7,2 b 11,1 c 3,2 or d 5,2

The answer would be B.
Steps: 
1. Take your X coordinate and plug it into your equation where the X is.
2. Take your Y coordinate and plug it into your equation where the Y is.
3. Distribute your Y to your numbers in the parenthesis.
4. Finally add the two numbers together.
5. See if you got the same answer on both sides of the equal sign.
Hope this helps! (:

They have to drive 2,050,650 more miles. Which is also 0.4 of the whole road trip.

Step-by-step explanation:

Subtract the miles they have already driven from the miles of the entire trip. Then use that and divide it by the miles of the entire trip and you'll get 0.4.