a = 56
given 28 =  a
 a
multiply both sides by 2 to eliminate the fraction
56 = a
As a check
 × 56 = 28 ← True
 × 56 = 28 ← True
 
        
                    
             
        
        
        
Answer:
x² - 16
Step-by-step explanation:
Use the FOIL method here where
F = first
O = outer
I = inner
L = last
F = x * x = x²
O = -4 * x = -4x
I = 4 * x = 4x
L = -4 * 4 = -16
Combine the terms to get x² - 16.
 
        
             
        
        
        
Answer:

Step-by-step explanation:
In this question, you are combining like terms, meaning doing equations to numbers that fit with only each other.
<u>So we should start on the number without variables:</u>
23 and 27
<u>Match them up together and you should find your first equation:</u>
23 - 7
==> -4
So we should have  -4  +  8m  +  4n  -  5m
Now we should combine the numbers with the variable of m:
8m and 5m
<u>Match them up together and you should find your first equation:</u>
<u></u>
8m - 5m
==> 3m
So we should now have -4  + 3m  + 4n
<u></u>
<u>Since there are no other variables of n, we are all done:</u>
<u>-4  + 3m  + 4n  is  your  final  answer </u>
 
        
             
        
        
        
Answer:
1,1716 + 143(12)
Step-by-step explanation:
i believe that is correct hope I helped you!