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Mathematics 8 Online
OpenStudy (anonymous):

Identify the number that does not belong with the other three. Explain your reasoning.

OpenStudy (anonymous):

OpenStudy (ibbutibbu.):

It is 26.6 because it cannot be negative

OpenStudy (anonymous):

can u answer with at least three sentences because thats what they want

OpenStudy (anonymous):

and i dont quite get it

OpenStudy (phi):

you need to know how numbers are classified. for example, see http://www.basic-mathematics.com/classification-of-numbers.html 3 of your numbers are rational, and one is irrational

OpenStudy (ibbutibbu.):

If you simplify \[\sqrt{48}\] then you would get a possibilirty if a negative number. -55.1 is already negative. So is -51/2 The only positive is 26.6. Therefore that is the answer

OpenStudy (imstuck):

You are looking for rational as opposed to irrational. Three are rational and one is not.

OpenStudy (imstuck):

negative numbers have nothing to do with the correct answer to this.

OpenStudy (anonymous):

so ? :( im confused and i dont have mcuh time

OpenStudy (imstuck):

@Ibbutibbu. that is incorrect.

OpenStudy (ibbutibbu.):

Oh. sorry

OpenStudy (imstuck):

Three of those numbers are rational. Rational numbers a. are repeating decimals b. terminating decimals, or c. can be expressed as a fraction. The square root of 48 is irrational because when you plug in the square root of 48 on your calculator, you get a decimal that does not repeat, nor does it terminate. It just goes on and on...

OpenStudy (anonymous):

so that is the coorect answer ? are u sure ?

OpenStudy (imstuck):

Um....yes, I'm quite sure. (High school math teacher and all...)

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