SOLUTION: Categorize each mathematical statement as either always true or never true. Select your answer from the pull-down list. 2x + 1 = 2x – 1 =not true 1 – 1/x = 1 + x =Alwa

Algebra ->  Probability-and-statistics -> SOLUTION: Categorize each mathematical statement as either always true or never true. Select your answer from the pull-down list. 2x + 1 = 2x – 1 =not true 1 – 1/x = 1 + x =Alwa      Log On


   



Question 272788: Categorize each mathematical statement as either always true or never true.
Select your answer from the pull-down list.

2x + 1 = 2x – 1 =not true
1 – 1/x = 1 + x =Always True
(a – b)c = ac – bc =not true
Are my answers correct and if not why?

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
2x + 1 = 2x – 1 =not true
Correct
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1 – 1/x = 1 + x =Always True
True when x = -1/x
x^2 = -1
x = +/-i
Conclusion: Never True
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(a – b)c = ac – bc =not true
This is the distributive law for Real Numbers
Always true
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Cheers,
Stan H.