Answer:
x^2 + 14x + 49
Step-by-step explanation:
Use the distributive property:
(x + 7)(x + 7) = x^2 + 7x + 7x + 49 = x^2 + 14x + 49
 
        
             
        
        
        
Answer:
 The number of wreaths Alaina sells is 9 .
Step-by-step explanation:
As given
Alaina is selling wreaths and poinsettias for her chorus fundraiser. 
Wreaths cost $27 each poinsettia cost $20 each.
 If she sold 15 poinsettias and made $543.
 Let us assume that the number of wreaths Alaina sells = x
 As the number of poinsettias  Alaina sells = 15
Than the equation becomes
27x + 15 × 20 = 543
27x + 300 = 543
27x  = 543 - 300
27x  = 243

x = 9 
Therefore the number of wreaths Alaina sells is 9 .
 
        
             
        
        
        

where 

 is the mean. Since


you have variance

and so the standard deiviation is
 
 
        
             
        
        
        
Answer:
176
Step-by-step explanation:
every 11 mm in the drawing equals 4m.
every 1 mm in the drawing equals 4/11 m
Actual size of school yard = 484*4/11 = 176m
 
        
             
        
        
        
<span>The equation of the directrix of the conic section </span>y^2 + 16y + 4x + 4 = 0 is x = 16.