Mathematics
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OpenStudy (anonymous):
To the nearest tenth, what is MN?
24.2
27.0
48.4
54
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OpenStudy (anonymous):
@jim_thompson5910
OpenStudy (anonymous):
@dan815
OpenStudy (anonymous):
Please please help
jimthompson5910 (jim_thompson5910):
looking at it now
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jimthompson5910 (jim_thompson5910):
how long is KL
OpenStudy (anonymous):
How long is KL?
OpenStudy (anonymous):
@jim_thompson5910
jimthompson5910 (jim_thompson5910):
yes, I'm asking you that
jimthompson5910 (jim_thompson5910):
the straight line distance from point K to point L
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OpenStudy (anonymous):
90?
jimthompson5910 (jim_thompson5910):
no
jimthompson5910 (jim_thompson5910):
the length starting from K and ending at L
OpenStudy (anonymous):
12?
jimthompson5910 (jim_thompson5910):
close, but no
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jimthompson5910 (jim_thompson5910):
you're missing a piece
OpenStudy (anonymous):
K all the way to L.
OpenStudy (anonymous):
15?
OpenStudy (anonymous):
@jim_thompson5910
OpenStudy (anonymous):
No.
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OpenStudy (anonymous):
Please help because i really do not know
jimthompson5910 (jim_thompson5910):
you add up those two numbers to get the total distance from K to L
jimthompson5910 (jim_thompson5910):
you're only going halfway (so to speak)
OpenStudy (anonymous):
27
jimthompson5910 (jim_thompson5910):
yes, KL = 27
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jimthompson5910 (jim_thompson5910):
that is the radius of the circle since K is at the center and L is on the circle edge
jimthompson5910 (jim_thompson5910):
what other segment is a radius of this circle?
OpenStudy (anonymous):
MN?
jimthompson5910 (jim_thompson5910):
MN is a chord because its endpoints are on the circle
jimthompson5910 (jim_thompson5910):
A radius is some segment that goes from the center to the edge of the circle.
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OpenStudy (anonymous):
KM?
jimthompson5910 (jim_thompson5910):
yes, KM is a radius
jimthompson5910 (jim_thompson5910):
all radii of the same circle are congruent (by definition of a circle is)
so KM = KL
KM = 27
jimthompson5910 (jim_thompson5910):
so we have this triangle
|dw:1417912104428:dw|
OpenStudy (anonymous):
Very nice way of thinking Jim, that honestly took me a while of staring at the diagram to figure that out.
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jimthompson5910 (jim_thompson5910):
P is the point at the intersection of KL and MN. They didn't label this point but should have.
OpenStudy (anonymous):
Thank You so much 27 is the correct answer
jimthompson5910 (jim_thompson5910):
no
OpenStudy (anonymous):
no LOL
jimthompson5910 (jim_thompson5910):
you need to find MP and then double it to get MN
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OpenStudy (anonymous):
You're not even a third done the question yet,
OpenStudy (anonymous):
is the answer 54?
OpenStudy (anonymous):
You have to learn in multiple choice questions, some answers are put there on a mathematical strategic point to fool you.
jimthompson5910 (jim_thompson5910):
|dw:1417912284062:dw|
OpenStudy (anonymous):
do i subtract 12 from 27?
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OpenStudy (anonymous):
Close.
OpenStudy (anonymous):
You substract 12^2 from 27^2 which would be equivalent to x^2.
OpenStudy (anonymous):
144 from 279?
OpenStudy (anonymous):
The ^ sign means to the power of.
OpenStudy (anonymous):
144 from 729
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OpenStudy (anonymous):
585
OpenStudy (anonymous):
Alright now your equation looks like this: x^2 = 585.
OpenStudy (anonymous):
How do you think you can solve X?
OpenStudy (anonymous):
By dividing it by 2?
OpenStudy (anonymous):
No, the opposite of an exposant is a square root.
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OpenStudy (anonymous):
24.1 thank you
OpenStudy (anonymous):
to the nearest tenth the answer is 24.2
OpenStudy (anonymous):
Hold on.
OpenStudy (anonymous):
You are awesome can you help me with others please i need this to graduate please
OpenStudy (anonymous):
That's not the answer yet.
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OpenStudy (anonymous):
24.1 is the length of MP and not MN.
OpenStudy (anonymous):
or 24.2
OpenStudy (anonymous):
what do i do next :(
OpenStudy (anonymous):
Well since the length of MP is 24.2, and MP is the half of MN, what do you think you have to do?
OpenStudy (anonymous):
multiply?
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OpenStudy (anonymous):
Multiply by what?
OpenStudy (anonymous):
2
jimthompson5910 (jim_thompson5910):
|dw:1417912760581:dw|