We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
+5
1023
2
avatar
-5/2x>30
 Jan 30, 2012
 #1
avatar
0
what is the answer to -5/2x>30?
 Jan 30, 2012
 #2
avatar+3089 
0
Quote:

what is the answer to -5/2x>30?



-5/2x > 30

-5/2x results in a problem at x=0:
so let's see the plot:
[input]plot( -5/(2x) , 30, x= -1..1, -10..40 )[/input]

as you can see, for all x>0 the result of -5/2x will be less than zero.

for x < 0:

-5/(2x)
x in the denominator, so try the reciprocal value: (switch > to <)

-5/2x > 30 | reciprocal
(2x)/-5 < 1/30
(2x) < -5/30 |*(-5)
x > -5/60 |/2
x > -1/12

so the result is: -1/12 < x < 0
 Jan 30, 2012

23 Online Users