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Whitepunk [10]
3 years ago
15

Reads 10 pages in one half 1 2 hour. What is the unit rate for pages per​ hour? For hours per​ page?

Mathematics
1 answer:
jekas [21]3 years ago
6 0
You would read 20 pages per hour
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Solves 2/7(4q+7/2)-3q=9
avanturin [10]
So we multiply both sides by 7 to make 2/7 a whole number. You get 2(4q+7/2)-21q=63. Then take 4q+7/2 out of parentheses and you get 8q+7-21q=63. Subtract 7 on both sides and add the q’s together, -13q=56. Divide both sides by -13 and you get around 4.3
7 0
3 years ago
Consider the experiment of tossing a fair coin three times and observing the number of heads that result (X = number of heads).
Crank

Answer:

The standard deviation for this distribution is 0.8660.

Step-by-step explanation:

For each coin toss, there are only two possible outcomes. Either it is heads, or it is tails. So we use the binomial probability distribution to solve this problem.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

In this problem, we have that:

In each toss, heads or tails are equally as likely, since the coin is fair. So p = \frac{1}{2} = 0.5

Three throws, so n = 3

What is the standard deviation for this distribution?

\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{3*0.5*0.5} = 0.8660

The standard deviation for this distribution is 0.8660.

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3 years ago
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Answer:

this the answer to the question I understand

{ (- 3)}^{4} \\  - 3 \times  - 3 \times  - 3 \times  - 3 \\ 9 \times 9 \\ 81

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Step-by-step explanation:

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