---A linear pair forms a line, which is equal to 180 degrees
#4. Adjacent
#5. Vertical, Complementary
#6. Vertical, Supplementary
---There is a 90 degree angle within this problem. If one angle is 90 degrees, then they are all 90 degrees, which makes the sum of angle 1 and 2 = 180. So, they are supplementary.
If you divide 6.75 by 1.5 then you would get that he walks 4.5 miles an hour. Then you would multiply 4.5 by 2.5 to get that he walks 11.25 miles in 2.5 hours.
