Answer:
-6
Step-by-step explanation:
 
        
             
        
        
        
The rate of the windows washed would be the amount of windows per minute. so the missing value is the amount of windows that she has washed
        
                    
             
        
        
        
Answer:
72.2%
Step-by-step explanation:
Given data
Initial price=  £245
Final price= £883
% increase= Final - Initial / final  *100
% increase=883 - 245 / 245 *100
% increase= 638 / 883 *100
% increase=0.722*100
% increase=72.2%
Hence the increase is 72.2%
 
        
             
        
        
        
Question a:
f(6) = (6)² + 2(6) + 8
f(6) = 36 + 12 + 8
f(6) = 56
Question b: 
f(x+4) = (x+4)² + 2(x+4) + 8
f(x+4) = x² + 8x + 16 + 2x + 8 + 8
f(x+4) = x² + 10x + 32
Question c:
f(-x) = (-x)² + 2(-x) + 8
f(-x) = x - 2x + 8
        
             
        
        
        
Answer:
Option C) 
 
           
Step-by-step explanation:
We are given the following in the question:
I is the annual income of a person in a country R
2 percent of one’s annual income = 

1 percent of one’s annual income = 

Average of  100 units of Country R’s currency and 1 percent of one’s annual income.

Income tax = 
2 percent of one’s annual income + Average of  100 units of Country R’s currency and 1 percent of one’s annual income.

Thus, income tax is given by
Option C) 
