√62 is your answer
√62 = 7.87400787...  (continuing)
hope this helps
 
        
                    
             
        
        
        
Answer:
See below.
Step-by-step explanation:
1. 3 * 15 + 4 * 15 - 5 * 15
45 + 60 - 75
105 - 75
30
2. 3x + 4x - 5x
7x - 5x
2x
3. 3(x-2) + 4(x-2) - 5(x-2)
3x - 6 + 4x - 8 - 5x + 10
2x - 4
4. (I'm not typing that out)
7.5x + 19.5 + 10x + 26 - 12.5x - 32.5
5x+13
-hope it helps
 
        
             
        
        
        
Answer:
You are right.
Step-by-step explanation:
The values corresponding to x = 3 is -5.
 
        
             
        
        
        
True! 
all parabolas with vertical directrix DO open to the left/right.