Answer:
the answer is: A 
because deduce means to arrive at a fact or conclusion by reasoning. 
also because the correct word you would use In option A is reduce. 
 
        
             
        
        
        
<span><span><span><span><span>(<span>5+4</span>)</span><span>(2)</span></span>+6</span>−<span><span>(2)</span><span>(2)</span></span></span>−1</span><span>=<span><span><span><span><span>(9)</span><span>(2)</span></span>+6</span>−<span><span>(2)</span><span>(2)</span></span></span>−1</span></span><span>=<span><span><span>18+6</span>−<span><span>(2)</span><span>(2)</span></span></span>−1</span></span><span>=<span><span>24−<span><span>(2)</span><span>(2)</span></span></span>−1</span></span><span>=<span><span>24−4</span>−1</span></span><span>=<span>20−1</span></span><span>=<span>19</span></span>
        
             
        
        
        
Answer:

Step-by-step explanation
The standard equation of a circle centered at origin is  
r = radius of the circle 
The circle is passing through the point (0,5)
∴ radius  
                
                
                
∴ The equation of the circle is 
      
 
        
             
        
        
        
Step-by-step explanation:
£480 = 120% (after adding the 20% VAT).
we want to know how much 100% is. 
he do we get from 120% to 100% ?
first the formal long way
£480 = 120%
1% = 120%/120 = 480/120 = £4
100% = 1% × 100 = 4×100 = £400
once you understand this mechanism, you can apply the direct shortcut :
£480 / 1.2 = £400
as a multiplication with 100/120 is the same as a division by 120/100, which is 1.2.
and what we did at the beginning in long form was nothing else than
£480 × 100/120 = 480 × 10/12 = 480 × 5/6 = £400