Step-by-step explanation:
f is (x+1)-1
and g (the next letter in the alphabet) is x-2
first for f 
x+1-1 = x
Then we -2 for g 
So every letter there o words is just 2 less than the previous letter like 
h would be h= x-4
so r(x) is g which is x-2 and x which would have to be the remaining amount to get to the number
 
        
             
        
        
        
I'm assuming there's a chart, but if there isn't,
The population will continue to increase and decrease, as the population will grow until it's reached its carrying capacity, and then decrease because there aren't enough resources, and then increase, then decrease, etc.
        
             
        
        
        
Step 1: Find the slope:
     
This gives you  , but we need to find b.
, but we need to find b.
To find b, substitute in one (x,y) pair and it doesn't matter which one.  I'll go with (4,-2):
     ![\begin{aligned}-2&=-\dfrac{3}{2}(4)+b\\[0.5em]-2&=-6+b\\[0.5em]4&=b\end{aligned}](https://tex.z-dn.net/?f=%5Cbegin%7Baligned%7D-2%26%3D-%5Cdfrac%7B3%7D%7B2%7D%284%29%2Bb%5C%5C%5B0.5em%5D-2%26%3D-6%2Bb%5C%5C%5B0.5em%5D4%26%3Db%5Cend%7Baligned%7D)
Now take that b-value and plug in into the slope-intercept form:
      
It's always a good idea to toss in the other x-value from the other point, to make sure it checks out.
 
        
             
        
        
        
The triangle sum theorem says all 3 interior angles must equal 180 degrees.
so, 43 + 35 = 78.  [ 180 - 78 = 102 degrees for the missing angles shared by the 2 triangles.
102 + 18 = 120.  [180 - 120 = 60}
leaving the measure of Angle A as 60 degrees.