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lina2011 [118]
3 years ago
5

Aditya installed solar panels for her house. When the solar panels produce more electricity than Aditya uses in a day, her net e

lectricity use is negative.
The graph below shows Aditya's net electricity use in the first week of July. The xxx-axis represents days in July, and the yyy-axis represents net electricity use in kilowatt-hours (\text{kWh}kWhstart text, k, W, h, end text).
Determine if each statement about the graph is true or false.
Mathematics
1 answer:
Sidana [21]3 years ago
3 0

Answer:

True and false

Step-by-step explanation:

The highest net electricity= true

Net electricity used on july 2nd= false

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Let X denote a random variable which corresponds to the number of players in a team who get injured during a game. If we assume
Feliz [49]

Answer:

(a)

The values of X can be 0, 1, 2 , ..., 10 . So, X is a discrete random variable.

(b)

The distribution of X is Binomial distribution with the parameters n = 10 and p = 0.2

(c)

Probability that no one or one person will be injured = P(X = 0) + P(X = 1)

= 10C0 * 0.20 * (1 - 0.2)10-0 + 10C1 * 0.21 * (1 - 0.2)10-1

= 0.810 + 10 * 0.2 * 0.89

= 0.3758096

(d)

Average value of X = np

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(e)

Variance of X = np(1-p)

Variance of X = 10 * 0.2 * (1 - 0.2) = 1.6

(f)

Number of ways in which 2 people gets injured = 10C2 = 10! / ((10-2)! 2!) = (10 * 9) / (2 * 1) = 45

Assume the best player got injures, number of ways in which one people out of remaining 9 people gets injured = 9C1

= 9! / ((9-1)! 1!)

= 9

Probability that the best player got injured = Number of ways in which 1 people gets out of 9 and best person gets injured / Number of ways in which 2 people gets injured

= 9 / 45

= 0.2

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The price of jeans was reduced $6 per week for 7 weeks. By how much did the price of the jeans change over the 7 weeks?
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The price changed by $42 over the course of seven weeks
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Hey there, all you do is multiply 20 by 20, 20×20=400. Therefore, the answer is 400 square feet.
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in a proportional relationship the ratio y/x is constant. Show that this ratio is not constant for the equation y=a-14
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To show that the ratio \frac{y}{x} is not constant for the function y=a-14 we only need to evaluate this function at 2 points and then show that the ratio is not the same for those two points. Note that here a represents x.  

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