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mestny [16]
3 years ago
15

The quadratic function f(x)=-5x^2+5 does the parabola open up or down

Mathematics
1 answer:
yulyashka [42]3 years ago
5 0
It opens down.
Since the beginning number -5x^2 is negative, it will open down.
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Sin theata=3/5, then cos theata= ?
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c^2=a^2+b^2\implies \sqrt{c^2-b^2}=a
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\sqrt{5^2-3^2}=a\implies \pm\sqrt{25-9}=a\implies \pm 4=a
\\\\[-0.35em]
\rule{34em}{0.25pt}\\\\
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Answer:

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