Mathematics
9 Online
OpenStudy (anonymous):
Evaluate y = 3|x| – 3 for x = –1. (1 point) ?? Can u please help me? :'(
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OpenStudy (aripotta):
just substitute -1 for x in the equation
OpenStudy (aripotta):
y = 3|-1| – 3
OpenStudy (aripotta):
then solve it
OpenStudy (anonymous):
so -3?? or 3
OpenStudy (aripotta):
y = 3|-1| – 3
y = 3(1) - 3 since the absolute value of -1 is 1
y = 3 - 3
y = 0
does that make sense?
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OpenStudy (anonymous):
Oh, okay yeah it does now! Thank ouy so much! (:
OpenStudy (aripotta):
no problemo :]
OpenStudy (anonymous):
Okay, here one more Q i'm having problems with
What is the value of the function when x = –2?
y = x2 – 3x + 1 (1 point)
OpenStudy (anonymous):
and this is the last one
OpenStudy (aripotta):
is that x^2?
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OpenStudy (anonymous):
Yeah
OpenStudy (anonymous):
–11
–10
10
11
OpenStudy (aripotta):
substitute -2 for x
y = -2^2 – 3(-2) + 1
OpenStudy (anonymous):
-11??
OpenStudy (aripotta):
why do you think it's -11
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OpenStudy (anonymous):
I don't knwo :(
OpenStudy (aripotta):
ok, do it in pieces
what's -2^2?
OpenStudy (anonymous):
-8?
OpenStudy (aripotta):
no
-2^2 = -2 times -2 = 4
OpenStudy (anonymous):
Ok
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OpenStudy (aripotta):
and what's -3(-2)?
OpenStudy (anonymous):
6
OpenStudy (anonymous):
+6 (positive 6)
OpenStudy (aripotta):
so
y = -2^2 – 3(-2) + 1
y = 4 + 6 + 1
y = ?
OpenStudy (anonymous):
+11?
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OpenStudy (anonymous):
11
OpenStudy (aripotta):
yes :]
OpenStudy (anonymous):
YAY!! :) Thanks so much
OpenStudy (aripotta):
mhmm no problem
OpenStudy (anonymous):
Thanks for not just giving me the answer i like to be helped not given the answer(:
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OpenStudy (aripotta):
well i hope it all made sense to you
OpenStudy (anonymous):
Ya know? So i can jearn how to do it and you made that possible for me tyhank you sooo much again
OpenStudy (anonymous):
It did a little bit mixed up but thats just my dyslexic acting up
OpenStudy (anonymous):
IDyslexic is hard but not impossible to work with
OpenStudy (anonymous):
I'm homeschooled because every teacher i had told je i was dumb, or got frusterated and didn't help me
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OpenStudy (aripotta):
i couldn't really tell you were dyslexic, i thought it was just your name lol i don't think you're dumb. i think you can really do this
OpenStudy (anonymous):
Thanks(: maybe i should change my name lo.l
OpenStudy (aripotta):
you can't change your name, you're stuck with it forever mwuhaha
OpenStudy (anonymous):
lol