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What is the distance between two points on a number line if
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29 Oct 2019, 09:14
29 Oct 2019, 09:14
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Question Stats:
68% (00:54) correct
31% (01:11) wrong based on 160 sessions
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What is the distance between two points on a number line if the coordinates of the points are \(4 + \sqrt{5}\) and \(2-\sqrt{5}\)?
A. \(2 - 2 \sqrt{5}\)
B. \(2 + 2 \sqrt{5}\)
C. \(6 + 2 \sqrt{5}\)
D. \(2\)
E. \(6\)
Kudos for the right answer and explanation
A. \(2 - 2 \sqrt{5}\)
B. \(2 + 2 \sqrt{5}\)
C. \(6 + 2 \sqrt{5}\)
D. \(2\)
E. \(6\)
Kudos for the right answer and explanation
Re: What is the distance between two points on a number line if
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24 Nov 2019, 22:45
24 Nov 2019, 22:45
1
Putting the conditions into the equation will look as shown below
Diff between 2 points on a number line = positive diff between them
(4+root(5)) - (2 - root(5))
4-2 +root(5) + root(5) ==> (negative,negative sign multiplication will give positive sign)
2 + 2root(5)
Hence, Option B is the Answer.
Diff between 2 points on a number line = positive diff between them
(4+root(5)) - (2 - root(5))
4-2 +root(5) + root(5) ==> (negative,negative sign multiplication will give positive sign)
2 + 2root(5)
Hence, Option B is the Answer.
Re: What is the distance between two points on a number line if
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14 May 2020, 12:13
14 May 2020, 12:13
3
Expert Reply
This problem is easy. However, usually the student use the formula to calculate the distance
You just need to make the difference between the two points
\(4 + \sqrt{5}\)
- \((2-\sqrt{5})\)
\(4 +\sqrt{5} - 2 +\sqrt{5 }\)
\(2 + 2 \sqrt{5}
\)
B is the answer
You just need to make the difference between the two points
\(4 + \sqrt{5}\)
- \((2-\sqrt{5})\)
\(4 +\sqrt{5} - 2 +\sqrt{5 }\)
\(2 + 2 \sqrt{5}
\)
B is the answer
