Answer:

Step-by-step explanation:
Given


Required
Find NOK
From the attached triangle, we have:
 --- Corresponding angles
 --- Corresponding angles
And

Substitute for LOK and LON

Make NOK the subject


 
        
             
        
        
        
Answer:
A general exponential equation is written as:
f(x) = A*(r)^x
Where:
A is the initial value, this is the value that the function takes when x = 0.
r is the rate of growth
x is the variable.
In this case, the function is:
f(x) = 2*(4)^x
The initial value is:
f(0) = 2*(4)^0 = 2*1 = 2
The initial value is 2.
And the rate of growth is 4.
So Martin seems to mixed these two values (he said initial value = 4, and rate  = 2, which is the opposite of what we found)
 
        
             
        
        
        
Answer:
20%
Step-by-step explanation:
30:6=5
yellow apples - 1/5 of 30
20x5=100
20%/30=6
 
        
             
        
        
        
Answer:
f(-4) = -9
Step-by-step explanation:
 f(x)=2x-1
Let x = -4
 f(-4)=2*-4-1
       = -8 -1
       = -9