Mathematics
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OpenStudy (anonymous):
Which of the following is a solution to √x-4+9=6 this would be -7 right thanks btw.
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OpenStudy (mertsj):
\[\sqrt{x-4}+9=6\]
OpenStudy (mertsj):
Is that the problem?
OpenStudy (anonymous):
yes sir.
OpenStudy (mertsj):
Did you subtract 9 from both sides?
OpenStudy (mertsj):
\[\sqrt{x-4}=-3\]
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OpenStudy (anonymous):
then +4
OpenStudy (anonymous):
it would just be 1
OpenStudy (anonymous):
x=1
OpenStudy (mertsj):
\[\sqrt{x+4}=-3\]
OpenStudy (anonymous):
oh -7.
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OpenStudy (mertsj):
Are you aware that this symbol:
\[\sqrt{}\]
OpenStudy (anonymous):
what does that mean then?
OpenStudy (mertsj):
means the POSITIVE square root?
OpenStudy (anonymous):
it is 1 then.
OpenStudy (mertsj):
So you have a statement that says that the POSITIVE square root is equal to NEGATIVE 3.
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OpenStudy (mertsj):
Can a positive number be equal to a negative number?
OpenStudy (anonymous):
no.
OpenStudy (mertsj):
Then what would your conclusion be?
OpenStudy (anonymous):
its -3
OpenStudy (mertsj):
Look at me: Can a positive number equal a negative number?
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OpenStudy (anonymous):
no
OpenStudy (mertsj):
Supposing I say to you: Find a positive number x such that x = -9. What would you say.
OpenStudy (anonymous):
9.
OpenStudy (mertsj):
Ok. Let me tell you what you should say. You should say, "There is no such number because a positive number cannot equal a negative number."
OpenStudy (anonymous):
THE ANSWER IS 1.
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OpenStudy (mertsj):
So let me get this straight:
OpenStudy (anonymous):
I dont have all day i wanna go to bed hurry up. Whats the answer.
OpenStudy (mertsj):
\[\sqrt{1-4}+9=6\]
OpenStudy (anonymous):
THE ANSWER IS 13.
OpenStudy (mertsj):
The answer is no solution. And stop with the foul language.
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OpenStudy (anonymous):
oh really because there is no option that says no solution.
OpenStudy (mertsj):
What is so hard to understand that there is no number that makes the sentence true.
OpenStudy (mertsj):
Then you haven't posted the problem correctly.
OpenStudy (anonymous):
x = -3
x = -7
x = 1
x = 13
OpenStudy (anonymous):
go to the top read what I posted there is not a 1 for x.
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OpenStudy (anonymous):
its |dw:1366634711383:dw|