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Snowcat [4.5K]
3 years ago
8

The number of lines of reflection about which the combined figure can reflect onto itself is ____

Mathematics
1 answer:
Fiesta28 [93]3 years ago
7 0
A square(hope it helps)
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Use Cramer’s Rule to solve system of equation.
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\left\{\begin{array}{ccc}5x+2y=4\\3x+4y+2z=6\\7x+3y+4z=29\end{array}\right\\\\A=\left[\begin{array}{ccc}5&2&0\\3&4&2\\7&3&4\end{array}\right]\\\\\det A=5\cdot4\cdot4+3\cdot3\cdot0+2\cdot2\cdot7-7\cdot4\cdot0-3\cdot2\cdot5-3\cdot2\cdot4=54\\W_x=\left[\begin{array}{ccc}4&2&0\\6&4&2\\29&3&4\end{array}\right]\\\det W_x=4\cdot4\cdot4+2\cdot2\cdot29+6\cdot3\cdot0-29\cdot4\cdot0-3\cdot2\cdot4-6\cdot2\cdot4=108

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Answer:

<h2>-1  2/3</h2>

Step-by-step explanation:

x-6=-4x-11

+x     +x

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+11     +11

5=-3x

________

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<em>PLEASE MARK BRAINLIEST</em>

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