Step-by-step explanation:
Solving
2x + 6 = 4x - 4
Bringing like terms on one side 
6 + 4 = 4x - 2x
10 = 2x 
10 / 2 = x 
5 = x
 
        
             
        
        
        
Mean is the average 
So the first mean is 11 
The second one is 14.7 so round to 15
15-11 is 4. Hope that is correct
        
                    
             
        
        
        
1) $375 
500 *.25= 125 
500-125= 375
2) (5/8)* 32= 20 girls in class
(3/8)* 32= 12 BOYS in class
4) 19+42+X=87
62+X= 87 (add 19 and 42 together )
X=25 ( subtract 87 from 62)
        
             
        
        
        
Answer:
11
3Step-by-step explanation:
Given
3(x - 1)² + 2x - 7 ← substitute x = 3 into the expression
= 3(3 - 1)² + 2(3) - 7
= 3(2)² + 6 - 7
= 3(4) - 1
= 12 - 1
= 11
 
        
             
        
        
        
Answer:
anything above 1
Step-by-step explanation:
-3/2 = -1.5. 
3 x -2 = -6
Nope
3 x -1 = -3 
Nope
3 x 1 = 3 Yes!!