Help! (1 Viewer)

[gretired]

ABSOLUTE VALUE OF 2X-5 IS MORE THAN -2 ....HOW DO I FIQURE THIS OUT?

 

[cro_angel]

i dont think i can really help because i havent done it?
but i dont think it can be less than -2.. if u draw up a table of values then graph it ull see it keeps doing down and down
but yeh i dunno it could be related to something we havent done yet

 

[SKA]

what the... i wouldnt have a clue.. wouldnt u have to know what x is before u minus 5 from it

its like saying take away 5 from a mystery number !! lol

i dunno... sorry

 

[Misturi]

l would say -3.

Two times X = 2x - 5 = -2

Thats how l would do it...you really need to draw up a table.

But thats just a guess...

l'd put X as 1, but you could put it as any number really, it there any other parts or numbers to that question?

 

[Misturi]

Sorry l stuffed up..

I did it again (not sure if its right or not) but l ended up with 2/1 or -2/1.

 

[Xayma]

Umm if the absolute value of 2x-5 will always be positive therefore it will always be greater then -2. Since an absolute value is always +ve.

 

[Misturi]

Thanks Xayma, l don't know much about it, but l thought l'd give it a shot anyways.

 

[Xayma]

Absolute Value is the distance from 0 on a number line. This means it is always positive, ie -3 is 3 units from 0 so |-3|=3 and 3 is also 3 units from 0 so |3|=3.

 

[Grey Council]

hrm, that is one dodgy question.

 

[= Jennifer =]

Xayma is right but i did that in 2 unit....i didnt think we did absolute value in general

 

[Rahul]

|2x-5| > -2

i prefer to do this by graphing y=|2x-5| and y=-2 and seeing where 'y=|2x-5| is above, or greater than, 'y=-2'. sometimes simultaneous equations may need to be used. but, i am unsure that whether general does graphing.

 

[Xayma]

Rahul its always going to be above that, since the two possible equations intersect on the x-axis.

 

[honky tonk]

Hmmm.. I never once did absolute values in General Maths..

 

[Rahul]

Xayma, you are right.

i didnt pay much attention to the question actually, rather than trying to point out a general method.

 

[Dash]

lol Rahul, shamed by a 04er!
heh... nice one Xayma

 

[Rahul]

lol shamed? he/she is probably smarter than me, and therefore you as well! jkz

 

[SKA]

that didnt make sense that question... but if u ask me.. i would think it was -3????

who wrote >-2

 

[KeypadSDM]

I think gretired misread the question. We can only hope he/she is going to reread the thread and correct the question.

Nothing inside absolute values can ever be negative, even in 4 unit.

 

[ajyt]

|2x-5| > -2

maybe the answer's all x

 

[craz]

hmm...i remember doing absolute values last year. but we did stuff with margins, percentages and using the + or -. in the same chapter we did normal distribution u know 99.5 and all that...