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Mathematics

OpenStudy (anonymous):

help please... brain fart

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OpenStudy (saifoo.khan):

lol

OpenStudy (anonymous):

\[(-5/4x+9)<0\]

OpenStudy (saifoo.khan):

\[-\frac54x + 9 < 0\] \[-\frac54 < -9\] \[-5x < -9 \times 4\] \[-5x < -36\] FLIP ACTION! \[5x > 36\] \[x > \frac{36}{5}\]

OpenStudy (anonymous):

(whispers) the 9 is under the denominator with the 4x... that is what i am having trouble with

OpenStudy (accessdenied):

soo.. \[ \frac{5}{4x + 9} < 0 \] ?

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OpenStudy (accessdenied):

with a negative

OpenStudy (anonymous):

yes

OpenStudy (accessdenied):

i havent done any rational inequalities... ever... but I think we're looking at when the graph is still negative, that would be where our denominator is greater than 0 that would be when 4x + 9 > 0 4x + 9 > 0 4x > -9 x > -9/4 x > -2 1/4 it looks like the graph would support this as well. its juts that I havent done any actual problems like this before! :P

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