Hey there!
When finding the difference of expressions like these, there's a few things you should keep in mind. 
1. When finding the difference of two polynomials, multiply the polynomial that implied to be "negative" by –1 to expand the problem and make it easier to solve. 
2. You combine terms based on their unknown terms, like x, y, x², ab, etc. You cannot combine the terms x and x², but you can combine the terms 6b and 8b by adding them. 
3. You can rearrange your terms however you see fit. If a polynomial is implied as "positive", you can multiply that entire polynomial by +1 to get rid of the parentheses. 
With all that in mind, you can go ahead and solve for your difference, like so:






 will be your difference. 
Hope this helped you out! :-)
 
        
             
        
        
        
Answer:
B
Step-by-step explanation:
 
        
             
        
        
        
5300 and 6000 is the elevation in miles
        
             
        
        
        
Answer:
y=6/5x-8 
Step-by-step explanation:
Hi there!
We want to find the equation of the line that passes through (5, -2) and has the slope of 6/5 
We can write the equation of the line in slope-intercept form, which is y=mx+b, where m is the slope and b is the y intercept.
Since we are already given the slope of the line, we can immediately plug it into the equation: 
y=6/5x+b
Now we need to find b
Since the equation passes through the point (5, -2), we can use it to solve for b
Substitute 5 as x and -2 as y: 
-2=6/5(5)+b
Multiply
-2=6+b
Subtract 6 from both sides 
-8=b
Substitute -8 as b. 
y=6/5x-8
Hope this helps!