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Mathematics 13 Online
OpenStudy (kmullis6):

Will fan and give medal! PLEASE HELP! A pharmacy claims that the average medication costs $32 but it could differ as much as $8. Write and solve an absolute value inequality to determine the range of medication costs at this pharmacy. |x − 32| ≥ 8; The medication costs range from $24 to $40 |x − 32| ≥ 8; The medications cost less than $24 or greater than $40. |x − 32| ≤ 8; The medication costs range from $24 to $40 |x − 32| ≤8; The medications cost less than $24 or greater than $40.

jagr2713 (jagr2713):

Answer is C

OpenStudy (kmullis6):

Do you mind telling me how you know?

jagr2713 (jagr2713):

start with 32 in the middle, then add/subtract 8 from it

jagr2713 (jagr2713):

-8 <= 0 <= 8 ; and let x be the center -8 <= x <= 8

OpenStudy (kmullis6):

Oh ok thanks (:

jagr2713 (jagr2713):

you're wecome

OpenStudy (kmullis6):

Can you help me with a few more?

jagr2713 (jagr2713):

ok

OpenStudy (kmullis6):

Which of the following is an equivalent form of the compound inequality −22 > −5x − 7 ≥ −3? −5x − 7 < −22 and −5x − 7 ≥ −3 −5x − 7 > −22 and −5x − 7 ≥ −3 −5x > −22 and −7 ≥ −3 −5x − 7 < −22 and −5x − 7 ≤ −3

jagr2713 (jagr2713):

−22 > (−5x − 7) greater than or equal to −3 : −22 > −5x − 7 2: -5x - 7 greater than or equal to −3

jagr2713 (jagr2713):

look at A, and compare each part to the original question.

jagr2713 (jagr2713):

So what do you think the answer is??

OpenStudy (kmullis6):

This stuff really confuses me. Sorry /:

jagr2713 (jagr2713):

its ok just switch the sign to the other side so you have -5x - 7 < -22

jagr2713 (jagr2713):

so what answer choice would you pick?

OpenStudy (kmullis6):

A or D right?

jagr2713 (jagr2713):

Yes, so the answer would be A :D

OpenStudy (kmullis6):

Ok. Thanks!

jagr2713 (jagr2713):

you're welcome

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