Mathematics 95 Online
OpenStudy (anonymous):

another question in 4x-4<5(-1x-3)-3 i get x<-14/9 so in interval notation it would be (-infty, -14/9)..... () because it is < and not equal but why do i put infty (-) and why do i put it first?

OpenStudy (amistre64):

you are simulating an abbreviated number line

OpenStudy (amistre64):

the number line goes from: -inf on the left, all the way to inf on the right

OpenStudy (anonymous):

okay buy why is it -infty, what about the equation makes it -, is it just - because 14/9 is or is there another reason?

OpenStudy (amistre64):

becasue all x's that can be used are to the left of -14/9 ; inequalities account for an area as opposed to a specific point

OpenStudy (anonymous):

so its because x is less than if it where greater than infty would be positive?

OpenStudy (amistre64):

yes

OpenStudy (amistre64):

the sign is sayng x is on <-- this side of -14/9 :)

OpenStudy (amistre64):

not at the moment, srry

OpenStudy (anonymous):

k well thanks again

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