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So the "back" of the arrow is on/above -20.
The arrow points to -12.
You added something to -20 to get to -12.
So the first number is -20. You added ? to get -12. -12 is the last number / the answer to the equation.
So the equation from what you have so far is -20 + ? = -12
You need to isolate the ? so that you know what it is.
So to get rid of the -20 (make it 0), you have to add 20. -20 plus 20 equals 0, which basically means it is gone. You also have to add 20 to -12. 20 plus -12 equals 8.
Now the equation is ? = 8.
So you know that the second number is 8.
The equation makes sense; -20 + 8 = -12.
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0.035 + x = 4.036
get x on its own
x = 4.036 - 0.035 = 4.001
so 4.001 is added
Answer:
1/2
Step-by-step explanation:
4 divided by 8 equals 1/2
The greatest common factor of the numerator and denominator of the rational expression is x - 4
<h3>How to determine the greatest common factor?</h3>
The fraction expression is given as:
![\frac{5x-20}{x^2-2x-8}](https://tex.z-dn.net/?f=%5Cfrac%7B5x-20%7D%7Bx%5E2-2x-8%7D)
Factorize the numerator and the denominator
![\frac{5x-20}{x^2-2x-8} = \frac{5(x-4)}{(x- 4)(x + 2)}](https://tex.z-dn.net/?f=%5Cfrac%7B5x-20%7D%7Bx%5E2-2x-8%7D%20%3D%20%5Cfrac%7B5%28x-4%29%7D%7B%28x-%204%29%28x%20%2B%202%29%7D)
Cancel out the common factor
![\frac{5x-20}{x^2-2x-8} = \frac{5}{(x + 2)}](https://tex.z-dn.net/?f=%5Cfrac%7B5x-20%7D%7Bx%5E2-2x-8%7D%20%3D%20%5Cfrac%7B5%7D%7B%28x%20%2B%202%29%7D)
The common factor that was canceled out is x - 4
Hence, the greatest common factor of the numerator and denominator of the rational expression is x - 4
Read more about greatest common factors at:
brainly.com/question/10076354
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