Answer: 
Step-by-step explanation:
This car follows a line, hence its motion can be modeled by the Line equation.
In fact, we already have two points of the line, if we call  the time in hours and
 the time in hours and  the traveled distance in miles:
 the traveled distance in miles:
Point 1:  
Since we are told the car's initial position is 300 miles in the time 0 h
Point 2:  
Since we are told the car's final position is 180 miles after 3h
<u />
<u>Let's find the Slope  :
</u>
:
</u>
 
 This is the slope of the line
  This is the slope of the line
Now, the equation of the line is:
 
We already know the slope, now we have to find the intersection point with the y-axis ( ) with any of the given points. Let's choose Point 1:
) with any of the given points. Let's choose Point 1:  
 
Isolating  :
:
 
Then, the equation of the line is:
 
 
        
                    
             
        
        
        
Answer:
cube rooting?
Step-by-step explanation:
like the cubed root of something
 
        
                    
             
        
        
        
Answer:
-8
Step-by-step explanation:
(x-3y=136) + (18x+3y=288) We collect both processes to make y's disappear
19x=-152
x=-8