P: parenthesis 
E: exponents 
MD: multiplication or division (whichever comes first left to right)
AS: addition or subtraction (whichever comes first left to right) 
This is the order of operations. We will use this to solve the equation correctly. 
We will start with the parenthesis. 2x3=6. 
[18/6]x4 
Next, we will do the rest of the parenthesis. 
18/6=3. 
This gets rid of the parenthesis (or brackets.) We will now do the rest of the problem, which is multiplying 3 and 4. 
3x4=12. 
12 is your final answer.
        
             
        
        
        
Answer:

Step-by-step explanation:
We need to sum the following two expressions:


expanding the polynomial in the numerator:


This is the most simplified form we can get: 

 
        
                    
             
        
        
        
Answer:
$342.30
Step-by-step explanation:
The original price of the computer is $489. The computer is discounted 30%, which means that 30% of the price is removed from the original price. 
30% of 489 is 
489 * 0.3 which is $146.7
146.7 is the discounted amount, not the selling price. To find the selling price, subtract how much is discounted ( 146.7) from the original price (489).
489-146.7= 342.3
 
        
             
        
        
        
Answer:
0.6 is BIGGgGer
Step-by-step explanation:
51/100 is the same as 0.51. 
Now compare 0.60 and 0.51
 
        
             
        
        
        
Answer:
\left(\frac{\sqrt{78}}{30},\ \frac{\sqrt{78}}{39}\ ,\frac{41\sqrt{78}}{390}\right)