Answer:

Step-by-step explanation:
÷ 
This equals;
(
).(
)
(5x -5) ÷ (x² - 2x
Simplifying this gives: 
Start with the answer format we want, and work your way toward forming a single fraction like so

Compare that last expression to (2x+1)/(x+2). Notice how the ax and 2x match up, so a = 2 must be the case.
Then we have 2a+b as the remaining portion in the numerator. Plugging in a = 2 leads to 2a+b = 2*2+b = 4+b. Set this equal to the +1 found in (2x+1)/(x+2) to have the terms match.
So, 4+b = 1 leads to b = -3
Therefore, a = 2 and b = -3
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An alternative route:

I added and subtracted 4 in the third step so that I could form 2x+4, which then factors to 2(x+2). That way I could cancel out a pair of (x+2) terms toward the very end.
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Other alternative methods involve synthetic division or polynomial long division. They are slightly separate but related concepts.
Step-by-step explanation:

Answer:
x cannot equal -4 (the last option)
Step-by-step explanation:
From the line, you can see x equals every number except -4 where there's an open circle, meaning that x cannot equal 4
Answer:
x+y/ 100 = 450
Step-by-step explanation:
450 = x% + y%
450 = x/100 + y/100
450 = x+y/100