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Dimas [21]
3 years ago
5

What equation is described below?

Mathematics
1 answer:
slega [8]3 years ago
8 0

Answer:

7×7=49

Step-by-step explanation:

Is means equals and times means multiply

7×7=49

True

7−7=49

7-7=0  False

7+7=49

7+7 =14  False

49÷7=7

True but this is not the equation described above

7×7=48

49False

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The distribution of the average amount of sleep per night gotten by college students is roughly bell-shaped with mean 412 minute
kirza4 [7]

Answer:

P(X

P(z

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".  

Solution to the problem

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(412,68)  

Where \mu=412 and \sigma=68

We are interested on this probability

P(X

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(X

And we can find this probability using the normal standard table or excel and we got:

P(z

4 0
3 years ago
If right answer good review
Nookie1986 [14]

Answer:

Bottom right graph is the correct answer

3 0
3 years ago
Read 2 more answers
Jada makes sparkling juice by mixing 2 cups of sparkling water with every 3 cups of apple juice. How much sparkling water does J
grandymaker [24]
<h2>Answer:</h2>

<u>Answer is 10 </u>

Step-by-step explanation:

I hope this is correct!

8 0
3 years ago
Read 2 more answers
A 14-pound bag of All-Natural dog food is $39.75. If the prices of different weighted bags of this brand of dog food are proport
tekilochka [14]

Answer:

$19.88

Step-by-step explanation:

just divide by two

8 0
3 years ago
I need help with this please and thank you!
Vlad [161]

Answer:  2x^2      -16t

               25t         -20

Step-by-step explanation:

Multiply the corresponding terms to find out which answer belongs in each box. For the top left box you would multiply  5t x 4t = 20t^2. For the top right multiply -4 x 4t = -16t. For bottom left box multiply 5t x 5 = 25t and for the bottom right box multiple -4 x 5 = -20.

6 0
3 years ago
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