use rhombus abcd and the given information to solve #15-18.
15) if mzbfc = (8x - 4)º, find x.
16) if mzbaf = 31°, find mzbca.
17) if ab = 7x - 12 and bc = 8x - 22, find ad.
18) if mzadb =(x- 15)° and mzcdb = (2x), find the value(s) of x.

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.

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

What expression is equivalent to log3(x+4)