15x-6=-90
explore how the values of algebraic expressions like100-x,5/x+5,and
 (3y) / (2y) change as the values of the variables change.
        
             
        
        
        
Answer:
none of these
Step-by-step explanation:
A number is divisible by 10 if the last digit of the number is 0. The numbers 20, 40, 50, 170, and 990 are all divisible by 10 because their last digit is zero, 0.
 
        
             
        
        
        
Answer:
$20.40
Step-by-step explanation:
 
        
             
        
        
        
Answer:
All real numbers except 3
Step-by-step explanation:
Given

Required
Determine the domain
We start by writing the following inequality

Add 6 to both sides


Divide both sides by 2



<em>As such, the domain of x is all real numbers except 3</em>
 
        
             
        
        
        
Answer:
109
Step-by-step explanation:
15+15+15= 45
7+7+7=21 
4+4+4=12
4+15×7=109
I hope this helps!