Answer:
Q is P reflected across the y-axis; only the signs of the y-coordinates of P and Q are different.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
triangle X and Z are congruent
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer: (7,5) X=7 and Y=5
Explanation:
Add the two equations together to eliminate y from the system. 
x-y=2 + x+y=12
= 2x = 14
Divide both sides by 2
x=7 
Substitute the value found for x into one of the original equations to solve for y
(7)-y=2 
Move all terms to one side to make it easier
-y=2-7 
Subtract
y=5 
        
             
        
        
        
Answer:  (-8, -80)
<u>Step-by-step explanation:</u>
y = 10x 
y = -3x - 104
Substitute "y" with "10x" into the second equation, then solve for x:
10x = -3x - 104
13x = -104         <em>added 3x to both sides</em>
   x = -8             <em>divided both sides by 13</em>
Next, substitute -8 for x into the first equation to solve for y:
y = 10(-8)
   = -80