3 years ago

ILL BRAINLIEST YOU IF YOU PLEASE HELP ME

Mathematics

1 answer:

goblinko [34]3 years ago

6 0

Answer:

11.313708498984760390413509793678 (round that)

Step-by-step explanation:

use pythag thorem, a^2 + b^2= c^2

a is 8 and b is 8 so square both and add them 64+64= 128

then take square root of 128 to find length c

and you get 11.313708498984760390413509793678

you are welcom

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3 years ago

PLEASE AND THANK YOU CONFUSED ON THIS

ICE Princess25 [194]

After staring at this for a few seconds, I think the equation

$-5\sqrt{10}\cdot\sqrt{15}=[1]\sqrt{[2]}$

is asking you to simplify the left hand side so that it has a form matching the right hand side, and [1] and [2] are placeholders. My guess is that they're supposed to be integers.

Notice that

$\sqrt{10}=\sqrt{5\cdot2}=\sqrt5\cdot\sqrt2$

$\sqrt{15}=\sqrt{5\cdot3}=\sqrt5\cdot\sqrt3$

$\implies\sqrt{10}\cdot\sqrt{15}=(\sqrt5)^2\cdot\sqrt2\cdot\sqrt3=5\sqrt{2\cdot3}=5\sqrt6$

Then multiplying by -5, we have

$-5\sqrt{10}\cdot\sqrt{15}=-25\sqrt6$

so I believe [1] = -25, and [2] = 6.

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