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3 years ago

PLEASE HELP - System of equations matrix prepresents

Mathematics

1 answer:

Sever21 [200]3 years ago

6 0

9514 1404 393

Answer:

the marked choice is the correct one

Step-by-step explanation:

A suitable calculator or web app can reduce this matrix for you.

The solution is represented by the matrix ...

$\left[\begin{array}{ccc|c}1&0&0&1\\0&1&0&-1\\0&0&1&3\end{array}\right]$

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3 years ago

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4 years ago

Please help!!<br><br>Find BD

Temka [501]

Answer: $8\sqrt{2}$

==========================================================

Work Shown:

Focus entirely on triangle ABD (or on triangle BCD; both are identical)

The two legs of this triangle are AB = 8 and AD = 8. The hypotenuse is unknown, so we'll say BD = x.

Apply the pythagorean theorem.

$a^2 + b^2 = c^2\\\\c = \sqrt{a^2 + b^2}\\\\x = \sqrt{8^2 + 8^2}\\\\x = \sqrt{2*8^2}\\\\x = \sqrt{8^2*2}\\\\x = \sqrt{8^2}*\sqrt{2}\\\\x = 8\sqrt{2}\\\\$

So that's why the diagonal BD is exactly $8\sqrt{2}\\\\$ units long

Side note: $8\sqrt{2} \approx 11.3137$

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3 years ago