Answer:
(-2,-110)
Step-by-step explanation:
First solve for x
20x−70=70x+30
x= -2 
Now substitute x for -2
y=20x−70
y=20(-2)-70
y = -110
 
        
             
        
        
        
Answer:
Which formula should be used to calculate the variance?   C
What is the variance? 58.5
 
        
                    
             
        
        
        
They are all (SAS)side angle side except for the bottom right one. This is because the question does not give the little ticks to show that one side is the same as the other. It is not good enough to assume they are congruent without proof.
        
             
        
        
        
Answer:
- 8 units units
Step-by-step explanation:
<u>We know that:</u>
<u>We can find one side by distance formula:</u>
- a =  
- a =  
<u>Then the perimeter is:</u>
- P = 4*2 = 8 = 8 units units