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Mathematics
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OpenStudy (anonymous):
1 question, see below.
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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
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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
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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
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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
\[-4\le2x<6\]
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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):
\[-2\le x<3\]
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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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