Answer:
12 ; 12 dollars
Step-by-step explanation:
Data provided in the question: 
Revenue function, R = 12x
R is in dollars
Now, 
The slope can be found out by differentiating the above revenue function w.r.t 'x'
thus, 
 =
=
 
or
slope = 12
Now, for the second case of selling one more unit i.e x = 1, the revenue can be obtained by substituting x = 1 in revenue function
therefore,
R = 12 × 1 = 12 dollars
 
        
             
        
        
        
Answer:
<em>Worker B needs 9 days to finish the rest of the work</em>
Step-by-step explanation:
<u>Proportions</u>
Worker A finishes a project on his own in 12 days and worker B does the same in 16 days.
Worker A does 1/12 of the project in one day and worker B does 1/16 of the project in one day. When working together, they do

After 3 days they have completed:

parts of the project, this means it still remains:

parts of the project and it is done by B alone. Since B does  per day, he now takes
 per day, he now takes

days to complete the project.
Worker B needs 9 days to finish the rest of the work
 
        
             
        
        
        
The answer is D. Since the x line is seconds and y is feet traveled it would mean that the train travels 180 feet in 3 seconds
        
                    
             
        
        
        
(Credit to guy/girl above) 63 miles 10 1/2 x 6 is 63.
        
             
        
        
        
92
Because similar triangles has congruent corresponding angle measures