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Mathematics 26 Online
OpenStudy (anonymous):

Solve the inequality |x-10| - 9 < -1 and graph The solutions. Then write the solutions as a comp

OpenStudy (anonymous):

As a compound inequality.

OpenStudy (anonymous):

Pleaseeee helpppp!!!!

OpenStudy (anonymous):

Do you know the first steps to solve the inequality?

OpenStudy (anonymous):

No not sure

OpenStudy (anonymous):

First step, is to isolate the absolute value side!

OpenStudy (anonymous):

How do u exactly do that

OpenStudy (anonymous):

By removing everything that's not INSIDE the absolute value sign on the left side of the inequality!

OpenStudy (anonymous):

So u remove the -9 < -1?

OpenStudy (anonymous):

Just the -9 because the -1 is on the right side of the inequality. When I say inequality i mean the symbol in the middle that looks like this: <

OpenStudy (anonymous):

Do do I cross out the -9?

OpenStudy (anonymous):

No you can't just make the -9 disappear into nothing.

OpenStudy (anonymous):

You have to add it to both sides!

OpenStudy (anonymous):

So what do we do with the -9 to get rid of it?

OpenStudy (anonymous):

You have to add 9 to the left side and the right side. |x-10| - 9 < -1 + 9 +9

OpenStudy (anonymous):

By adding the opposite of -9 you can cancel it out with itself!

OpenStudy (anonymous):

So it would be 8?

OpenStudy (anonymous):

Yes! It would be 8 on the right side!

OpenStudy (anonymous):

So now do we work within the absolute value on the left side?

OpenStudy (anonymous):

So now we have |x-10| < 8 and now the absolute value sign has been isolated!

OpenStudy (anonymous):

Yes but you have to do something special to solve that absolute value. Do you know what's next?

OpenStudy (anonymous):

Ok so now what's the next step

OpenStudy (anonymous):

Multiply?

OpenStudy (anonymous):

Now you have to break the absolute value into "cases".

OpenStudy (anonymous):

How will we do that?

OpenStudy (anonymous):

|x-10| < 8 is broken down into x-10 < 8 and x-10 > -8|dw:1440964722548:dw|

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