The two angles create a linear pair which equals 180 degrees. . First you should set up the equations as 2x+68=180 and solve. X will equal 56. To prove the equation is correct you will plug the 56 in for x which would give the equation 2(56)+68=180 which ends up being 180=180 which proves the equation correct.
If you've traveled 124 miles in 2 hours, than in one hour must've been 62 miles. 62 multiplied by 3 is 186, which is how much miles have been traveled in 3 hours. Plus the 15 minutes would probably be 201 miles. Hope this helps!
