21 - 3 + 18 ÷ 6 =
7 x 9 - 3 x 4 + 10 =

Taking algebra two apex courses and need with these questions

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.