<h3>
Answer: 
units is the exact length of AB</h3>
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Explanation:
Use the distance formula to get this answer. The idea is you subtract the x coordinates together, and do the same for the y coordinates as well. Square each result and add up those squares. The last step of the formula is to apply the square root to get the distance from A to B, which is also the length of segment AB.

Therefore, 
Option D is a linear equation, so it represents a direct linear variation.
Hope this helps!
Answer:
The correct answer is A, If I practice football, then I will improve.
,
distributive property is an algebra property which is used to multiply and single term in two or more terms inside a set of parentheses
Answer:
The value of the variable in an equation which satisfies the equation is called a Solution to the Equation.
example: So for example we take the equation 2n=10, If n = 1, the number of matchsticks is 2.
hope it helps