Question

interval notation
5x+10>50
I got x=8
how do I write it in interval notation
(-inf,8)

Answer 1

you got x>8 and not x=8,,this little thing helps ?

Answer 2

yes I got it but how do I write is as a interval notation
(-\infty,8)\]

Answer 3

\[(-\infty,8)\]

Answer 4

does 9 fall in (-inf,8) ?

Answer 5

hun, I am lost
what does 9 have to do with this

Answer 6

i just randomly picked a no..according to x>8,,9 should be a solution,,but does your interval include 9 ?

Answer 7

no i don't think so

Answer 8

do i write it as \[(-\infty,8) or (8,-\infty) or ( 8,\infty)\]

Answer 9

which one according to you contains 9,,or 10..etc ?

Answer 10

I have no idea where this 9 even came into this help

Answer 11

[infinity,8)
The above interval notation means the interval of all the real numbers between infinity and 8, including infinity but excluding 8.

Answer 12

lol..i just randomly picked a no. hoping to make things simpler..hmm,,nevermind..
ans will be (8,inf)

Answer 13

why is it \[(8,\infty)\] and not the other way around

Answer 14

I am so lost with interval notation I can not make heads or tails of it

Answer 15

thanks I will look at it right now

Answer 16

http://www.mathwords.com/i/interval_notation.htm
The above link gives detailed information on the format for interval notation.

Answer 17

-5x-12<8
I got -4
so i put it in interval notation
(-4,inf)

Answer 18

nops..again wrong..should have been (-inf,-4)

Answer 19

YYYYYYYYYYY

Answer 20

wow, I sound like a big baby

Answer 21

see when it was x>8, it meant x can take values 8.8 ,9 ,9.7 ,100 ,12678, etc,,till infinty
so we write it as (8,inf) signifying from 8 to infinity !
now can you see why that one is wrong..

Answer 22

oh! I am so slow thanks

Answer 23

so because the x is larger the number is first and positive

Answer 24

hmm..

Answer 25

guess I am still lost

Answer 26

try this one
2x + 6 > x -7

what should be the ans ?