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Norma-Jean [14]
3 years ago
13

Alex conducted an experiment with a spinner. He recorded the frequency of each spin landing on letters A through D. Based on the

data in the table, what is the experiment probability that the next spin will land on the letter B ?

Mathematics
1 answer:
satela [25.4K]3 years ago
3 0
It’s 1/4 because there are only 4 options

For example you reach into a bag of 10 marbles 4 are blue and 6 are red what is the probability of getting a blue marble? Easy 4/10 cause there’s only 4
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Sin α = 21/29, α lies in quadrant II, and cos β = 15/17, β lies in quadrant I Find sin (α - β).
Sever21 [200]
\sin(\alpha-\beta)=\sin\alpha\cos\beta-\cos\alpha\sin\beta

\sin\alpha=\dfrac{21}{29}\implies \cos^2\alpha=1-\sin^2\alpha=\dfrac{400}{841}

Since \alpha lies in quadrant II, we have \cos\alpha, so

\cos\alpha=-\sqrt{\dfrac{400}{841}}=-\dfrac{20}{29}

\cos\beta=\dfrac{15}{17}\implies\sin^2\beta=1-\cos^2\beta=\dfrac{64}{289}

\beta lies in quadrant I, so \sin\beta>0 and

\sin\beta=\sqrt{\dfrac{64}{289}}=\dfrac8{17}

So

\sin(\alpha-\beta)=\dfrac{21}{29}\dfrac{15}{17}-\left(-\dfrac{20}{29}\right)\dfrac8{17}=\dfrac{475}{493}
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3 years ago
If there are 60 min in a hour, 60 sec in min and 10 counts in a second how much is half of a second
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Which of the follow statements is correct for the graph shown?
igor_vitrenko [27]
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4 years ago
Drag each tile to the correct box.
melamori03 [73]

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