Answer:
B. 1
Step-by-step explanation:
5x + 10 = 15
 -10 -10
5x = 5
÷ 5 ÷ 5
x = 1
 
        
             
        
        
        
Answer:
x - 4 = 0 and x - 2 = 0
Step-by-step explanation:

 
        
                    
             
        
        
        
Can you post the scale drawing please so I can help you
        
                    
             
        
        
        
Answer: perceived lack of anonymity
Step-by-step explanation:
The source of bias that occurs when a group of students are asked to evaluate their teacher mid-quarter is a perceived lack of anonymity.
Perceived lack of anonymity occurs when the responder is afraid that if he or she gives an honest answer, it can end up affecting them negatively. 
In this case, the students may be afraid that giving an honest opinion on the teacher will affect them.
 
        
             
        
        
        
Answer:
A rational number is a number that can be express as the ratio of two integers.
Step-by-step explanation: