Answer:
-50
Step-by-step explanation:
b-5 
b-5 = -45 ( collect like terms)
b = -45 + -5
b = -45 -5 b = -50
Answer:
10
Step-by-step explanation:
For this case, we can model the problem as a rectangle triangle.
We know:
Height of the triangle.
Base of the triangle.
We want to know, angle between the hypotenuse and the base of the triangle.
For this, we use the following trigonometric relationship:

Clearing the angle we have:
Answer:
the angle of depression from the spotlight to the bottom of the door is:
A) 39 degrees