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siniylev [52]
3 years ago
14

Help with radicals, questions down in attachments.

Mathematics
1 answer:
Makovka662 [10]3 years ago
8 0
We can't solve first 2 because of missing diagramd
but, longest side=hypotonuse=c
other 2 sides=legs=a and b
a^2+b^2=c^2
\sqrt{a^{2}+b^{2}}=c

last 2
1.
remember that
longest side<sum of other 2 sides or else you can't make a traignel
5+7=12
12<13
13 is longest side
13<12 is false
therefor it is false that it is a triangle
not a triangle


2.
\sqrt{ \frac{x}{y} } = \frac{ \sqrt{x} }{ \sqrt{y} } so
\sqrt{ \frac{20}{7} } = \frac{ \sqrt{20} }{ \sqrt{7} } =\frac{4\sqrt{5} }{\sqrt{7} }
rationalize denomeator by multplying by \frac{ \sqrt{7} }{ \sqrt{7} }

\frac{4\sqrt{35} }{7}





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