How much money will you save if you have a 20% discount on $27.29

Simplify the expression. -2/5(10+15m-20n)

Icould really use some with this question.

Aportion of a hiking trail slopes downward at about an 84° angle. to the nearest tenth of a flot, what is the value of x, the distance the hiker traveled along the path, if he has traveled a horizontal distance of 120 feet? a. 143.3 b. 12.5 c. 120.7 d. 130.2