Hello.
The answer is: The Commutative property
The Commutative property states that order does not matter. Multiplication and addition are commutative. Commutative is also when you change the order of the equation but its still that same answer.
Have a nice day. 
 
        
             
        
        
        
Answer:
6x - 6
Step-by-step explanation:
<em>The only step necessary here is to simplify. We can subtract 18 from 12 since they are like terms. </em>
6x - 6.
<em>That's it! That's your final answer. </em>
 
        
             
        
        
        
Answer:
Step-by-step explanation:
Use the formula

Fill in the info we are given:
 and
 and
 and
 and
1210 = P(1.255632915) so
P = $964
 
        
             
        
        
        
Answer: Step 1 box= 19 (2+3+4+5+5)
Step 2 box= 3.8 (19 divided by 5) 
Step-by-step explanation:
You add together the numbers to get 19, the you divide the number by five because you added 5 numbers together. 
You had it just right on the bottom. Your equation was perfect. It doesn't matter if you get a decimal number. 
Your answers are right too, I double checked. 
Hope I was helpful. 
 
        
             
        
        
        
Answer: 7
Step-by-step explanation:
1. multiply both sides by -6 so the -6 on the right side could cancel out and the left side would be -6:  1= a-13/-6 ==> -6=a-13
2. add both sides by 13 so -13 on the right side could cancel out and the left side would be -6+13: -6=a-13 ==> -6+13=a-13+13
3. you know -6+13 equals 7 right? so the answer is a=7