Answer:
x^2 -2x + 1
Step-by-step explanation:
Think of a quadratic equation as
ax^2 + bx + c
x^2 -2x +
Comparing the two equations
a = 1 ,  b = -2,  c = ?
c becomes the missing part
Divide b by 2
-2/2 = -1
square the result
-1^2
= 1  this is what to add to get a perfect square
x^2 -2x + 1
(x - 1)^2
 
        
             
        
        
        
Answer:
1250000
Step-by-step explanation:
Let number of the total number of shoes sold be 'y' 
y*(70/100)= 875000
70y = 875000*100
y = (875000*100)/70
y = 1250000
 
        
                    
             
        
        
        
<h3>
Answer:   -16n-41</h3>
Work Shown:
2(-n-3) -7(5+2n)
2(-n)+2(-3) - 7(5)-7(2n) ... distribute
-2n - 6 - 35 - 14n
(-2n-14n) + (-6-35)
-16n - 41
 
        
        
        
Answer: Yes 
Step-by-step explanation: A triangle can be formed because A+B>C
A and B are 2.9 and 4.8 
Since those numbers have the least value
I added both and found that A and B are equal to 7.7 
7.7>7.4 
These sides could form a triangle