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strojnjashka [21]
3 years ago
7

Which statement best describes Marcos equation

Mathematics
1 answer:
satela [25.4K]3 years ago
6 0
Marco's equation is correct.  Cosine is an even function, which means that for every x, f(-x) = f(x).  In other words, you get the same answer for a negative value that you would for its corresponding positive value.  
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PLEASE HELP FAST!!! How many solutions does this system have?
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Step-by-step explanation:

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Use the Pythagorean theorem:

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b^2=63\to b=\sqrt{63}\\\\b=\sqrt{9\cdot7}\\\\b=\sqrt9\cdot\sqrt7\\\\ \boxed{b=3\sqrt{7}}

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