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LiRa [457]
3 years ago
13

Sue has taken four exams so far in her History course. Her scores are 84.0, 78.2, 93, and 87.5. What is the average of these sco

res?
Mathematics
1 answer:
Nataliya [291]3 years ago
3 0

Answer: 85.7

Step-by-step explanation:

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Which histogram represents a data set with a mean of 4.5 and a standard deviation of 1.7?
AVprozaik [17]

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that would be the third one

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Respuesta de la expresión 5 + {4 * 6÷3+1+ [3-(4-8) + (3-2)] }
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Vota Trump

Step-by-step explanation:

7 0
3 years ago
What is 140 rounded to the nearest hundredth
muminat

I mean, there is no decimal place, so you can’t determine to the nearest hundredth place.

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7 0
3 years ago
PLEASE HELP
Margaret [11]

Answer:

$21

Step-by-step explanation:

First, find the price without the discount by adding 12 to 30:

30 + 12

= 42

To find the original cost of each game, divide 42 by 2

42/2

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So, each game was originally $21

5 0
2 years ago
Help guys with the question
Naya [18.7K]

Answer:

\sin\Big(\dfrac{\theta }{2}\Big) = \dfrac{2\sqrt 5}{5}

Step-by-step explanation:

\cos(2x) = \cos^2 x-\sin^2 x = 1-2\sin^2 x \\ \\ \cos(x) = 1-2\sin^2 (\frac{x}{2}) \\ \\ \Rightarrow \sin^2 (\frac{x}{2}) = \dfrac{1-\cos(x)}{2}\\ \\ \sin(\frac{x}{2}) = \pm \sqrt{\dfrac{1-\cos(x)}{2}},\quad x\in [\frac{3\pi }{2},\pi] \Rightarrow \frac{x}{2}\in [\frac{3\pi}{4},\frac{\pi}{2}]\\ \\ \Rightarrow \sin(\frac{x}{2}) > 0 \Rightarrow \sin(\frac{x}{2}) = \sqrt{\dfrac{1-(-\frac{3}{5})}{2}} \Rightarrow \sin(\frac{x}{2}) = \sqrt{\dfrac{8}{10}}=\dfrac{2\sqrt 2}{\sqrt{10}} = \\ \\ =\dfrac{2\sqrt 5}{5}

7 0
3 years ago
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