Can somebody help I don’t understand this question.

Answer the questions in the attachment. a rescue helicopter is at point a and a rescue boat is at point e. the helicopter pilot spots boats in distress at points d and c,with angles as marked in the diagram. figure abce is a rectangle. the altitude of the rescue helicopter, represented by ae, is 5000 feet.

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?