Mathematics
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OpenStudy (anonymous):
What is the value of x in the diagram?
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OpenStudy (anonymous):
diagram?
OpenStudy (anonymous):
OpenStudy (anonymous):
Sorry, my internet is slow tonight
OpenStudy (anonymous):
is the perimeter given
OpenStudy (anonymous):
No
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OpenStudy (anonymous):
can you please give full infomation
OpenStudy (anonymous):
The only available information is the question, the diagram, and four answer choices:
A: 15
B: 5 2/5
C: 19
D: 3/5
OpenStudy (anonymous):
is it a right angled triangle
OpenStudy (anonymous):
Based on the diagram, that's what it looks like. 2 right triangles together.
OpenStudy (anonymous):
no only the upper angle looks like 90degree
and the line is its angle bisector
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OpenStudy (anonymous):
if it is 90 degree you can use Pythagoras Theorem
OpenStudy (anonymous):
I only know one side of three though
OpenStudy (anonymous):
a^+b^=c^
It would end up looking like 9+b=c
OpenStudy (anonymous):
please re check the question
OpenStudy (anonymous):
and write it as it is
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OpenStudy (anonymous):
I wrote it exactly as it was put.
OpenStudy (wolf1728):
Height^2 = 25^2 - 15^2
Height^2 = 625 - 225
Height^2 = 400
Height = 20
x^2 = 20^2 + 9^2
OpenStudy (anonymous):
it gives
\[x=\pm \sqrt{481}\]
OpenStudy (anonymous):
So x would be 29^2? The square root of 29 is 5 something... Would my answer be 5 2/5 @wolf1728?
OpenStudy (anonymous):
You are confusing me @mack7
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OpenStudy (anonymous):
sry
OpenStudy (wolf1728):
wowok - look at the equation I posted
x^2 = 20^2 + 9^2
OpenStudy (anonymous):
So I add 20^2 and 9^2?
OpenStudy (wolf1728):
Yes
OpenStudy (anonymous):
That is 481 right?
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OpenStudy (wolf1728):
Yes - and what do you do now?
OpenStudy (anonymous):
Find the square root of that number?
OpenStudy (wolf1728):
Correct
OpenStudy (anonymous):
I got 21.93 but that isn't one of my answer choices
OpenStudy (wolf1728):
That is the answer
but the choices are:
A: 15
B: 5 2/5
C: 19
D: 3/5
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OpenStudy (anonymous):
Yes.
OpenStudy (anonymous):
What do I do?
OpenStudy (wolf1728):
I don't know
I'm looking at that diagram again
OpenStudy (anonymous):
Thank you for helping me
OpenStudy (wolf1728):
Wow that is a lousy diagram - I'm trying to see how another answer might be produced.
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OpenStudy (anonymous):
It is. I might just pick 19 because it is the closest to 21. I'll email my teacher about the mistake
OpenStudy (wolf1728):
Okay - good idea wowok
OpenStudy (wolf1728):
any ideas Mack?
OpenStudy (anonymous):
Thank you very much! :)
OpenStudy (wolf1728):
Well okay wowok