Prob 1:

-14x = -632 - 26y 

y = (7/13)x - 316/13 



1st eqn can be rewritten as:

 Dividing both sides, by 26

 Simplifying



This is the same as the second line! So the two equations refer to the same

line - None of the choices are correct.



Prob 2:

Consider the period between 2 hours and 4 hours. At the end of 2 hours, he was 110

miles away, and at the end of 4 hours, he was 210 miles away. So in 2 hours,

he has travelled (210-110) = 100 miles.

So the average speed = 100/2 = 50.



That means, in the 2 hours after leaving the restaurant, he would have travelled

(50*2) = 100 miles as well. But it is stated that he has travelled a TOTAL 

distance of 110 miles at that time. So, the distance from his home to the 

restaurant is (110 - 100) = 10 miles. Ans D.



Hope you got it :)



 

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