Answer:
Yes because if x it less than or equal to 3, x can equal 3, meaning it is a solution.
 
        
             
        
        
        
Answer:
the answer is 16 hours
Step-by-step explanation:
i just multiplied 12(the amount he gets from tutoring) and multiplied it by different numbers  to see which one gets him past $190
 
        
             
        
        
        
From what i'm understanding you want to know the equation for 37+.75x which is correct
        
             
        
        
        
Answer:

Step-by-step explanation:
You can do this using the quadratic equation:

Let's first setup our expression:
4x² + 12x = 135
the quadratic formula is:
 ax² + bx + c = 0
4x² + 12x - 135 = 0
Then:
a = 4
b = 12
c = -135
Now we plug in our coefficients and solve:

We solve for both to determine the positive one:
 
              
 
                        
 
                                 
 
                                        
 
                                           
So if you are looking for a positive solution, just take the positive one as x. 
 
        
             
        
        
        
Make a proportion
6/18 = 10/z
Cross multiply
180 = 6z
180/6 = z
Z = 30