Answer:
£22
Step-by-step explanation:
Area to be painted
4walls - door
a = 4(2.6 * 3.5) - 2.2 * 0.8
a = 34.64 m²
Paint needed
p = 34.64 / 8
p = 4.33
Must round up
p = 5 liters
Tins needed
t = 5/2
t = 2.5
must round up
t = 3
Cost
since 1 is free with 2 will pay for 2
c = 11 * 2
c = 22
£22
 
        
             
        
        
        
Answer:
Let the side of  one square be x.    Area = x*x = x²
Then the side of other square  would be 2x ,   Area = 2x*2x = 4x²
Combined area = x² + 4x²  = 5x²
This combined area = 45 cm²
you simplify 
Therefore  5x²  = 45   Divide both sides by 5
                  x²  =  45/5
                  x²  = 9        Take square root of both sides
                  x   =  √9
                  x  = 3
Length of larger square is 2x  = 2*3 = 6 cm
Length of larger square = 6cm
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Step-by-step explanation:
 
        
                    
             
        
        
        
The answer I got to this was 2.3 but I don't know if that's correct. 
        
             
        
        
        
So 45% OF 40 is 
45% * 40 
0.45 * 40
that is 18
18 is 18% of what number?
18 = 18% * x
18 = 0.18 * x
divide both sides by 0.18
100 = x
45 % of 40, which is 18, and is 18% of 100.
Hope this helps