Answer:
approximation is often useful when it is not a very good one
 
        
             
        
        
        
Answer:
21 students
Step-by-step explanation:
25% of 28 is 7 28-7=21
 
        
             
        
        
        
Answer:
y=x is the correct answer
Explanation:
A linear equation is an equation between two variables that gives a straight line when plotted on a graph.
Why the other ones are incorrect:
y=√x gives a radical function graph
y=x^3 gives a cubic graph
y=x^2 gives a parabola
 
        
             
        
        
        
Answer:
75.398
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Hot Dog and Bologna
Step-by-step explanation: