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What is the distance between (7) and (10) on the number line?

Answer and explanation

Correct answer: (3) units

The direct answer is option B: 3 units. Distance on a number line means the positive separation between two points, so use the absolute difference: \(|10-7|=|3|=3\). Since 10 is to the right of 7, simply subtract the smaller number from the larger number. Option B is correct. Option A, 2 units, would be the distance between numbers differing by 2, not these two points. Option C, 7 units, is just one coordinate and does not measure the gap between the points. Option D, 10 units, is the other coordinate, not the separation. Distance cannot be negative, so the absolute-value idea is important if the order is reversed: \(|7-10|\) is also 3. On the number line, count the three unit intervals from 7 to 10. Memory cue: distance between two numbers is \(|a-b|\), or larger minus smaller.

Related tags

PolynomialsNumber-LineDistanceClass-10

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