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Mathematics 19 Online
OpenStudy (anonymous):

@jim_thompson5910 need help number 10 please

OpenStudy (anonymous):

jimthompson5910 (jim_thompson5910):

to find x, solve \[\Large x^2 + x^2 = 12^2\] for x

OpenStudy (anonymous):

x2+x2= 144

jimthompson5910 (jim_thompson5910):

good, what's next

OpenStudy (anonymous):

idk

jimthompson5910 (jim_thompson5910):

\[\Large 2x^2 = 144\]

jimthompson5910 (jim_thompson5910):

now divide both sides by 2

jimthompson5910 (jim_thompson5910):

\[\Large x^2 = \frac{144}{2}\] \[\Large x^2 = 72\]

jimthompson5910 (jim_thompson5910):

and take the square root of both sides \[\Large x = \sqrt{72}\] \[\Large x = 6\sqrt{2}\]

OpenStudy (anonymous):

yay we did it!

OpenStudy (anonymous):

now we hav to find z and y

jimthompson5910 (jim_thompson5910):

to find y, solve the equation \[\Large y\sqrt{3} = 12\] for y \[\Large y\sqrt{3} = 12\] \[\Large y = \frac{12}{\sqrt{3}}\] \[\Large y = \frac{12\sqrt{3}}{3}\] \[\Large y = 4\sqrt{3}\]

jimthompson5910 (jim_thompson5910):

I'll let you do the last part. To find z, solve \[\Large a^2 + b^2 = c^2\] \[\Large 12^2 + (4\sqrt{3})^2 = z^2\] for z

OpenStudy (anonymous):

wat about z??

jimthompson5910 (jim_thompson5910):

\[\Large 12^2 + (4\sqrt{3})^2 = z^2\] \[\Large 144 + 16(3) = z^2\] \[\Large 144 + 48 = z^2\]

OpenStudy (anonymous):

@jim_thompson5910 i got 192 thts the final answer for z?

OpenStudy (anonymous):

or is it 36864??

jimthompson5910 (jim_thompson5910):

\[\Large 144 + 48 = z^2\] \[\Large 192 = z^2\] \[\Large z^2 = 192\] \[\Large z = \sqrt{192}\] \[\Large z = 8\sqrt{3}\]

jimthompson5910 (jim_thompson5910):

you take the square root of 192, not square it

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