Just subtract the lowest number from the greatest number.
For example,
the distance between 3 and 8, is 8 - 3 = 5 units,
the distance between -2 and 3, is 3 - (-2) = 3 + 2 = 5 units,
the distance between -4 and -2, is -2 - (-4) = -2 + 4 = 2 units.
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The distance is 15, because -6 is 6 spaces away from zero and 9 is 9 spaces away from zero. You add the two distances to find the distance between the two numbers.
To get the distance between ANY two points on a number line: * Subtract one number from the other * Take the absolute value of the result In symbols: distance(a, b) = | a - b |
Usually that sort of question wants to know where the square root lies. It is between 9 and 10.
In order to find the ratio of two areas, you times it by the number of a number to get the number of the numbers numbers number, and that number divide by the first number which is 6 and then do the square root of the numbers number to get that number, which you will times by 2.
See lemma 1.2 from the cut-the-knot link. Yes, you can.