Answer: 
x < 30
Step-by-step explanation:
x is every number less or equal to 30
 
        
             
        
        
        
Answer:
the rational numbers that doesn’t have a reciprocal are [math]0 [/math] (which can also be expressed as [math]\frac {0} {x}, x \neq 0 [/math] ), and any number of the form [math]\frac {x} {0} [/math].
Step-by-step explanation:
 
        
             
        
        
        
Step-by-step explanation:
2x = y-10
Rewrite as: 2x + 10 = y
Therefore:
2x+10 = y
2x +7 = 2y
Subtract the equations:
  2x + 10 = y
- 2x + 7 = 2y
______________
           3 = -y
Therefore y = -3
Substiture y = -3 into the second equation:
2x + 7 = 2(-3)
2x + 7 = -6
2x = -13
x= -6.5
Answer : (-6.5, -3)
 
        
                    
             
        
        
        
Answer: 
Each cirlcle is defined by its radius and pie.
Step-by-step explanation:
If you want to rotate and or reflect any shape split yoiur graph into quarters just to make it easyer, fold the image upon its self dependiing on oppisite location of the previous shape.