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3 years ago

Refer to the chart, and then use the drop-down menu to complete each statement

Mathematics

2 answers:

Gwar [14]3 years ago

8 0

1. is increasing
2.40
3.40
i checked on edgeunity these are correct hope this helped.:) <span />

fredd [130]3 years ago

6 0

Answer:

is increasing

Step-by-step explanation:

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Katyanochek1 [597]

Answer:

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Step-by-step explanation:

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The boat speed is the average = (48 + 32)/2 = 40 mph

The current is the difference = 8 mph

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Answer:

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3 years ago

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Answer:

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2 years ago

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2 years ago

Solve the equation on the interval [0, 2pi): 12cos^2 x-9=0<br><br><br> What to do?

siniylev [52]

Answer:

$\large\boxed{x=\dfrac{\pi}{6}\ \vee\ x=\dfrac{5\pi}{6}\ \vee\ x=\dfrac{7\pi}{6}\ \vee\ x=\dfrac{11\pi}{6}}$

Step-by-step explanation:

$12\cos^2x-9=0\qquad\text{add 9 to both sides}\\\\12\cos^2x=9\qquad\text{divide both sides by 12}\\\\\cos^2x=\dfrac{9}{12}\\\\\cos^2x=\dfrac{9:3}{12:3}\\\\\cos^2x=\dfrac{3}{4}\to\cos x=\pm\sqrt{\dfrac{3}{4}}\\\\\cos x=\pm\dfrac{\sqrt3}{2}\\\\\text{Look at the picture}\\\\x=\dfrac{\pi}{6}\ \vee\ x=\dfrac{5\pi}{6}\ \vee\ x=\dfrac{7\pi}{6}\ \vee\ x=\dfrac{11\pi}{6}$

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2 years ago