Ineed with these problems on angle of elevation and depression. i don't understand it.

Find the area of a parallelogram with base 15 yards and height 21 2/3

(03.03 mc) choose the graph below that correctly represents the equation 2x + 4y = 24. (5 points) select one: a. line through the points 0 comma 6 and 12 comma 0 b. line through the points 0 comma negative 6 and 12 comma 0 c. line through the points 0 comma negative 12 and 6 comma 0 d. line through the points 0 comma 12 and 6 comma 0

Rewrite so the subject can be y in the formula d=m-y/y+n