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Mathematics 19 Online
OpenStudy (anonymous):

1 question, see below.

OpenStudy (anonymous):

What is the solution to the compound inequality?

OpenStudy (anonymous):

Post the inequality

OpenStudy (dobby1):

\[-8\le2x-4<2\]

OpenStudy (dobby1):

ok so once again we need to get x by it's self

OpenStudy (dobby1):

so we need to get rid of the 4 and it is a negative 4 so what do we do

OpenStudy (anonymous):

take 4 from both sides.

OpenStudy (anonymous):

Add. You do the opposite

OpenStudy (anonymous):

You ADD 4.

OpenStudy (anonymous):

i did.

OpenStudy (dobby1):

no when you add 4 to all the sides the negative 4 will turn to a zero because it is not a positive 4

OpenStudy (anonymous):

I did it from a calculator, so.

OpenStudy (dobby1):

did you put -4+4

OpenStudy (dobby1):

or 4+4

OpenStudy (anonymous):

sorry, didnt know that 4 was a negative.

OpenStudy (dobby1):

yeah when there is a minus sign in front of anything it is nagative

OpenStudy (anonymous):

i just thought that was a subtraction sign.

OpenStudy (dobby1):

it is but since there is a 4 behind it the 4 is a negative

OpenStudy (anonymous):

ok.

OpenStudy (anonymous):

so -4<2x-0<2

OpenStudy (dobby1):

or \[-4\le2x<6\]

OpenStudy (dobby1):

you add 4 to the 2 also

OpenStudy (anonymous):

oh ok.

OpenStudy (dobby1):

now divide 2 from all the sides giving you?

OpenStudy (anonymous):

-2<x<3

OpenStudy (dobby1):

\[-2\le x<3\]

OpenStudy (dobby1):

SO AMAZING

OpenStudy (anonymous):

So the answer is -2<x<3?

OpenStudy (dobby1):

yes

OpenStudy (dobby1):

could I have a medal

OpenStudy (dobby1):

thx

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