Answer:
B
Step-by-step explanation:
1/2x - 2 > 0
collect like terms
1/2x > 0 + 2
1/2x > 2
Divide both sides by 1/2
x > 2 divided by 1/2
inverse of 1/2 is 2/1
x > 2 times 2/1
x > 4
 
        
                    
             
        
        
        
Answer:
x=-1/2
Step-by-step explanation:
2x+2=4x+3
-1=2x
x=-1/2
 
        
             
        
        
        
Answer:
C
Step-by-step explanation:
0.28x=13.44
 
        
             
        
        
        
<span>
Let's analyze Hannah's work, step-by-step, to see if she made any mistakes. </span>In Step 1, Hannah wrote 

 <span> as the sum of two separate derivatives </span>

 <span>using the </span><span>sum rule.
</span>
This step is perfectly fine. In Step 2, 

 was kept as it is, and 

 was rewritten as 

 using the constant rule.Indeed, according to the constant rule, the derivative of a constant number is equal to zero.
This step is perfectly fine. In Step 3, 

  was rewritten as 

 supposedly using the constant multiple rule.
The problem is that according to the constant multiple rule, 

 should be rewritten as 

 and not as 

.  
<span>
Therefore, Hannah made a mistake in this step.</span>
 
        
        
        
Answer:
B = 50 & C = 130
Step-by-step explanation:
I really don't know how to explain but 180 - 50 = 130 for C and 50 is the measurement for B