Are you smarter than an 8th grader? - JeepForum.com

 
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post #1 of 7 Old 05-15-2012, 06:40 PM Thread Starter
igrok
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Are you smarter than an 8th grader?

Okay, I'm helping my daughter with her math home work and I'm rocking the scatter plots and x and y intercepts and slope questions, then comes along inequalities. No problem, I can handle inequalities, after all, I did this stuff 30 years ago. I run across this problem and for the LIFE of me, can't remember what to do:

S >W - 56
.........- 7

and S > 6

the ........ is just to line up the denominator

Solver gets a cold 1554 (new belgium brewing company) -- I'll email it to ya.

I know the answer, just can't figure out how.

Common sense is surprisingly, not that common.
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post #2 of 7 Old 05-15-2012, 06:49 PM
bumzo1
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ok I think I may have figured it out

s>(w-56)/-7

-7s<(w-56)

w>(56-7s)

since the minimum value of 7s is 7(6), 42 you would think it was w>14 but s could be greater than 6 which would mean that w could be less than 14. hmmm what type of answer am I looking for?

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post #3 of 7 Old 05-15-2012, 07:02 PM Thread Starter
igrok
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Quote:
Originally Posted by bumzo1 View Post
ok I think I may have figured it out

s>(w-56)/-7

-7s<(w-56)

w>(56-7s)

since the minimum value of 7s is 7(6), 42 you would think it was w>14 but s could be greater than 6 which would mean that w could be less than 14. hmmm what type of answer am I looking for?

Ding ding ding!!! Tell him what he's won Jack! You're right, 14 is the answer - thank you for your logic - it is quite impressive. I didn't think to use the 6 as a minimum input for the variable "S".

Common sense is surprisingly, not that common.
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post #4 of 7 Old 05-15-2012, 07:11 PM Thread Starter
igrok
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Quote:
Originally Posted by JeepForum123 View Post
-7s=w-56
w= -7s+56
i dont need a 1554, just helping someone out
thanks!!

Common sense is surprisingly, not that common.
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post #5 of 7 Old 05-16-2012, 11:39 AM
mJUSTINm
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Apparently I'm not smarter than an 8th grader.

-Justin
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post #6 of 7 Old 05-16-2012, 07:33 PM
bravobravo
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whatever the question bacon is always the answer.

^ it made more sense in my head

removed for stirring the pot
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post #7 of 7 Old 05-16-2012, 07:46 PM Thread Starter
igrok
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Quote:
Originally Posted by bravobravo View Post
whatever the question bacon is always the answer.
Man, I like the way you're thinking!

Common sense is surprisingly, not that common.
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