Mathematics
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OpenStudy (anonymous):
Which inequality has the solution of a < - 4?
a + 4 > 0
a – 1 < 3
a + 3 < -1
a – 4 > 0
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OpenStudy (xapproachesinfinity):
okay so you a<-4
this can be written as a<-3-1
add 3 to both side
a+3<-1 !
OpenStudy (xapproachesinfinity):
the other options you are given are different and don't satisfy this inequality
OpenStudy (xapproachesinfinity):
okay try and solve them and give me the answer
OpenStudy (anonymous):
Can you show me how?
OpenStudy (xapproachesinfinity):
no wrong! you cannot change the sign
this subtraction not multiplication
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OpenStudy (anonymous):
im not sure which one of you is right
OpenStudy (xapproachesinfinity):
a+4>0
sub 4
a>-4
OpenStudy (xapproachesinfinity):
My answer is right sir! xD
OpenStudy (anonymous):
so the correct answer is?
OpenStudy (xapproachesinfinity):
No my answer is completely right
if you disagree show your proof
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OpenStudy (xapproachesinfinity):
haha! well if wrong prove me wrong! that's very mathematic^_^
OpenStudy (xapproachesinfinity):
Okay no worries!
OpenStudy (anonymous):
can you help me with one more please
OpenStudy (anonymous):
thank you
OpenStudy (anonymous):
The correct answer is the third one
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OpenStudy (anonymous):
sure I'll try
OpenStudy (anonymous):
Evaluate 27 × a-2 for a = 3.
one-third
one-ninth
9
3
OpenStudy (anonymous):
thank you
OpenStudy (xapproachesinfinity):
Thanks meh!
OpenStudy (xapproachesinfinity):
you are welcome marissa^_^
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OpenStudy (anonymous):
No problem now lets help our friend
OpenStudy (anonymous):
yes thank you!
OpenStudy (anonymous):
is the x a multiplication sign or a variable
OpenStudy (anonymous):
multiplication sign
OpenStudy (anonymous):
I'm stumped let me ask for some other people to help you @ganeshie8 @xapproachesinfinity @Hero @JoannaBlackwelder @gswag98 @math92130
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OpenStudy (xapproachesinfinity):
\(\large 27\times a^-2\)
OpenStudy (xapproachesinfinity):
that's a^-2
OpenStudy (xapproachesinfinity):
Now just put 3 in place of x
OpenStudy (joannablackwelder):
*In place of a.
OpenStudy (xapproachesinfinity):
27x(3)^-2=27/(3)^2
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OpenStudy (xapproachesinfinity):
yeah in place of a i meant typo hehe thanks for the correction
OpenStudy (xapproachesinfinity):
so 27/9=3
OpenStudy (joannablackwelder):
No worries. You're doing great :)
OpenStudy (xapproachesinfinity):
thanks! ^_^
OpenStudy (anonymous):
so the answer would be?
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OpenStudy (joannablackwelder):
27/9=3
OpenStudy (anonymous):
thank you so much
OpenStudy (xapproachesinfinity):
I gave you the answer hehe can't you see it lol
OpenStudy (xapproachesinfinity):
welcome!