I do believe that this answer will Slope intercept
The answer to this question is 21
Yes the x values are all different, if two were the same then it would not be one but in this case it is
One approach that might be a great help would be if you would look
at the choices ... those things at the bottom of the question that you
didn't give us.
-- One leg is 3 times the length of the other leg.
-- Any right triangle that has one leg three times as long as the other
leg is similar to this triangle.
I'll bet that if you look through the choices, you'll find one there.
Answer:
4 hours because the two lines cross when the hour is 4
