Answer:
I forgot the answer but hey I go free points!
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Opens downward, like a frowning face
Step-by-step explanation:
 
        
                    
             
        
        
        
So 1 hour= 60 minutes
60+25= 85 minutes
Now we should subtract the 42
85-42=43
        
             
        
        
        
Answer:
An introduction of sets and its definition in mathematics. The collection of well-defined distinct objects is known as a set. ... The word well-defined refers to a specific property which makes it easy to identify whether the given object belongs to the set or not.
 
        
             
        
        
        
Answer:
Non-proportional; the rate of change is $40/hour
Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form  or
 or  
In a proportional relationship the constant of proportionality k is equal to the slope m of the line <u>and the line passes through the origin</u>
Let
x -----> the number of hours
y ----> The total charge in dollars
The equation of the line in slope intercept form is equal to

where
 m is the slope
 b is the y-intercept
we have

substitute

This relationship is not proportional, because the line not passes through the origin
therefore
Non-proportional; the rate of change is $40/hour