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Mathematics 8 Online
OpenStudy (anonymous):

Solve:

OpenStudy (anonymous):

Solve what?

OpenStudy (anonymous):

\[-10\le-4x-18\le30\] a. \[-12\le x \le -2\] b. \[2\le x \le 12\] c. \[-2 \le x OR x \le-12\] d. \[12<x <-2\]

OpenStudy (anonymous):

Its A.

OpenStudy (igreen):

\(-10\le-4x-18\le30\) Add 18 to all terms. What's -10 + 18? And what's 30 + 18? @pigglet

OpenStudy (anonymous):

48 @iGreen

OpenStudy (igreen):

@juliephillips Don't give out answers. Read the Code of Conduct. https:/www.openstudy.com/code-of-conduct

OpenStudy (anonymous):

Oh sorry. @iGreen Congrats on the 99...

OpenStudy (igreen):

https://www.openstudy.com/code-of-conduct

OpenStudy (igreen):

Yes, 30 + 18 = 48, what about -10 + 18?

OpenStudy (igreen):

Thanks @juliephillips In fact, I just got it yesterday..xD

OpenStudy (anonymous):

I saw. In OS feedback..

OpenStudy (anonymous):

8 @iGreen

OpenStudy (anonymous):

yes......

OpenStudy (igreen):

Yep, that gives us: \(8 \le -4x \le 48\) Now divide -4 to all terms. 8 / -4 = ? 48 / -4 = ? @pigglet

OpenStudy (igreen):

Oh cool. @juliephillips

OpenStudy (anonymous):

8/-4=-2 ? 48/-4=-12? @iGreen

OpenStudy (anonymous):

YES

OpenStudy (igreen):

Yep, so that gives us: \(-2 \ge x \ge -12\) or \(-12 \le x \le -2\)

OpenStudy (anonymous):

so, its a. Thanks!

OpenStudy (igreen):

Remember to switch both signs 'cause you divided by negative numbers.

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