Answer:
-5/1
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
first one is 2.2mm/year and second is 6.2years and -2.2mm/year
Step-by-step explanation:
Just trust me im right
 
        
             
        
        
        
Answer:
45 
Step-by-step explanation:
3x+x has to add up to 180
3x+x=180
4x/4=180/4
x=45
 
        
                    
             
        
        
        
Hmmm well may I ask what your doing with the shapes bc um well if you put them shapes in the circle/oval why is it hard? I don’t do this stuff I’m confused...
 
        
             
        
        
        
<h3>
Answer:</h3>
- -100x +100; 3
- 5x +81; 162
<h3>
Step-by-step explanation:</h3>
The distributive property is your friend. It tells you ...
   a(b + c) = ab + ac
It can also be used to simplify the product of binomials (or other polynomials).
   (a +b)^2 = (a +b)(a +b) = a(a +b) + b(a +b) = a^2 +ab +ab +b^2
   (a +b)^2 = a^2 +2ab + b^2 . . . . . . . worth remembering
1. (x -10)^2 -x(x +80) = (x^2 -20x +100) +(-x^2 -80x)
   = -100x +100 . . . . . . simplified form
For the purposes of calculation, it can be easier to factor out 100:
   = 100 (1 -x)
Then for x = 0.97
   = 100(1 -0.97) = 100(0.03) = 3
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2. (2x +9)^2 -x(4x +31) = (4x^2 +36x +81) -4x^2 -31x = 5x +81
For x = 16.2, this is ...
   5(16.2) +81 = 81 +81 = 162
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The purpose of the attachment is to show the evaluation is correct.