Answer:
lol ty for the points
Step-by-step explanation:
 
        
             
        
        
        
The answer is 5/2. The equation is already in point slope form. If you recall, the equation for point slope form is y-y1 = m(x-x1) where y1 and x1 are points on the graph, and m is the slope. In the given equation, m is 5/2 so we know it is the slope. 
Alternatively, if you are not familiar with the point slope for equation, you can manipulate the equation to the form of y=mx+b where m is the slope and b is the constant. If you solve for y, you get y=5/2x-1 since 5/2 is in the place of m, we know 5/2 is the slope.
 
        
        
        
A). Pi m
Explanation:
Arc length formula:
Arc length = (Ø/360°) * 2*Pi*r 
Ø = given angle (degrees)
r = radius 
Plug given numbers in:
(45°/360°)* 2* Pi * 4
This will give you the answer of Pi
        
             
        
        
        
Your answers will be: 
x= 0.44
and 
x= -1.84