Mathematics
16 Online
OpenStudy (anonymous):
More Algebra help please!! ^_^
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OpenStudy (anonymous):
I chose C
rishavraj (rishavraj):
why C???
OpenStudy (anonymous):
Because I solved it and saw that C looks right. But im guessing not now xD
rishavraj (rishavraj):
lol,......see
\[a^{x + 2} = a^{3x - 8}\]
it means
\[x + 2 = 3x - 8\]
OpenStudy (anonymous):
So D? Im so confused.
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rishavraj (rishavraj):
Yup...:)
OpenStudy (anonymous):
I have 2 more >_<
For this one I didn't know what to choose o-o
rishavraj (rishavraj):
see graph suggests tht when x = 5 ; f(x) = -2
and also x = -2; then f(x) = -5
remember a question u asked previous time...its like tht
rishavraj (rishavraj):
@LeilaJudeh wht say???
OpenStudy (anonymous):
so set x equal to 5 and figure that out right?
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rishavraj (rishavraj):
yeah.....check options ...u r gonna enjoy..
OpenStudy (anonymous):
A
rishavraj (rishavraj):
BINGO.....:))
OpenStudy (anonymous):
ONE MORE
But I have noooo idea for this one
rishavraj (rishavraj):
pH = - log (conc. of H+)
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OpenStudy (anonymous):
that looks scary o-o
OpenStudy (anonymous):
okay so II plug in the ph, but then how do I solve it?
rishavraj (rishavraj):
i used scientific calculator...lol...;P
got the answer.....
OpenStudy (anonymous):
I have no idea what im doing rishav o.O
rishavraj (rishavraj):
see
\[3.1 = - \log {H} \]
\[10^{3.1} = [H]^{-1}\]
[H] -- means concentration of hydrogen ions
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OpenStudy (anonymous):
idk A?
rishavraj (rishavraj):
nah .....
OpenStudy (anonymous):
THIS IS HARD.
rishavraj (rishavraj):
u got something like
\[1.79 \times 10^{-4}\]
OpenStudy (anonymous):
no?
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rishavraj (rishavraj):
wht did u get??
OpenStudy (anonymous):
a bunch of random number. I have no idea what im doing...! o-o
rishavraj (rishavraj):
hold on
OpenStudy (anonymous):
...
rishavraj (rishavraj):
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rishavraj (rishavraj):
have a look...i hope it helps...and yeah i used scientific calculator for solving it
rishavraj (rishavraj):
@LeilaJudeh and yeah the values r really creepy....huh
OpenStudy (anonymous):
Okay so I see how to you did it. But seriously its very confusing
rishavraj (rishavraj):
ya it is .....all bcoz of the values.......
OpenStudy (anonymous):
-.-
Anyways Thank you Risshav!!
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rishavraj (rishavraj):
hey theres only one "s" in my name.....plzzz
OpenStudy (anonymous):
That was supposed to be an H xDD
rishavraj (rishavraj):
and yeah u r most welcome.....no my name contains one "h"....lol.....
:)))xD
OpenStudy (anonymous):
yea ik so I meant to put riSHav one s and one h xD
rishavraj (rishavraj):
thanks....:)