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OpenStudy (anonymous):
were
OpenStudy (kearsten):
\[y=\sqrt{2x+6}\]
OpenStudy (freckles):
you don't want any negatives inside there
you want 2x+6 to be positive or zero
that means you want 2x+6 to be greater than 0 or equal to 0
that means you need to solve 2x+6>=0
OpenStudy (kearsten):
umm okay...
OpenStudy (freckles):
umm okay... is an interesting response
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OpenStudy (freckles):
what does it that really mean
OpenStudy (kearsten):
it means i have no idea wat u just said
OpenStudy (freckles):
oh I would have no way of knowing that
OpenStudy (freckles):
do you know what positive or zero means?
OpenStudy (kearsten):
yes
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OpenStudy (freckles):
means >0 or =0 right?
OpenStudy (kearsten):
okay..
OpenStudy (freckles):
if something is positive it is always greater than 0
if something is 0 it is equal to 0
we wanted 2x+6 to be positive or zero
so we wanted 2x+6>=0
OpenStudy (freckles):
solving 2x+6>=0 will give you the domain
OpenStudy (kearsten):
okay
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OpenStudy (freckles):
in pretty math symbols \[ \text{ you need to solve } 2x+6 \ge 0\]
OpenStudy (kearsten):
r u gonna help me or just sit there?
OpenStudy (freckles):
I didn't know you required further assistance
OpenStudy (freckles):
you first want to isolate the 2x part
OpenStudy (freckles):
try subtracting 6 on both sides
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OpenStudy (kearsten):
i completely suck at math andneed an answer
OpenStudy (freckles):
let me see what you have after subtracting 6 on both sides
OpenStudy (kearsten):
x=-3?
OpenStudy (freckles):
well don't forget you had an inequality not and equation
OpenStudy (freckles):
2x+6>=0
subtract 6 on both sides
2x>=-6
divide 2 on both sides
x>=-3
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OpenStudy (freckles):
anyways just remember us people on openstudy who help don't get paid and we don't have esp
so I would appreciate being spoke kinder too
thanks