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OpenStudy (saifoo.khan):
Jon's new mini computer monitor has a 20 cm by 24 cm LCD screen with a plastic trim border. The total area of the monitor and border is 672 cm2. How wide is the trim around the monitor?
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OpenStudy (anonymous):
-36 = -1 + 5x
OpenStudy (saifoo.khan):
How?
OpenStudy (anonymous):
that seems extremyl wrong to me
OpenStudy (anonymous):
this is basic math..... you can do it saif
OpenStudy (saifoo.khan):
im getting 4. how about it?
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OpenStudy (anonymous):
of course your getting 4
OpenStudy (saifoo.khan):
is it correct?
OpenStudy (saifoo.khan):
(24+w)(20+w)=672 480+44w+w^2=672 w^2 + 44w - 192 = 0 (w+48)(w-4) = 0 w = -48 or w = 4 we will neglect the negative value, So, w = 4
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