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ycow [4]
3 years ago
10

Need a little help on this simple math question

Mathematics
2 answers:
Free_Kalibri [48]3 years ago
8 0

Answer:

You answer is D

Mnenie [13.5K]3 years ago
8 0

Answer:

<HJI = 105°

Step-by-step explanation:

<GJI = <FJH (vertical angles)

x + 60 = 5x

-4x = -60

x = 15

so <GJI = <FJH  = 15 + 60 = 75

<HJI = 180 - <GJI = 180 - 75 = 105

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Answer:3/2

Step-by-step explanation:

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3 years ago
Can someone help me please
Semenov [28]

Sin E is B. 1.

After making an equation i came up with this.

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Which expression represents "5 less than the product of 9 and the sum of a number and 3"?
Nikitich [7]

Answer:

(9(x+3))-5

Step-by-step explanation:


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3 years ago
Miss Lopez had 618 and 5400s in her checking account she deposits 50 and 2500 into her account how much will she have left in he
34kurt
618+5400=6018
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8 0
4 years ago
An instructor believes the distribution of scores on her final exam will have mean 62 and standard deviation 7. Fred is a studen
OLga [1]

Answer:

a) P(47

And then the probability that Fred will not score between 47 and 77 is

1-0.968 = 0.0321

b) P(45

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Part a

Let X the random variable that represent the scores of a population, and for this case we know the distribution for X is given by:

X \sim N(62,7)  

Where \mu=62 and \sigma=7

We are interested on this probability  on the probability that Fred will not score between 47 and 77. So we can begin finding this probability

P(47

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(47

And we can find this probability on this way:

P(-2.143

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-2.143

And then the probability that Fred will not score between 47 and 77 is

1-0.968 = 0.0321

Part b

P(45

And we can find this probability on this way:

P(-2.429

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-2.429

7 0
3 years ago
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