You can only do it like '7.5 plus 9.5 plus 13
2 because it is the number being added to the zero intercept in the equation
13 yards because there is 3 feet per yard so I divided 40 by 3 and I got 13.3333...... So I rounded that to 13. Hope that helped! :)
Taking K as the right angle =>
cos (L) = segment LK / hypotenuse
=> cos(L) = segment LK / √ [ (segment LK)^2 + (segment KJ)^2 ]