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Maslowich
3 years ago
11

School X and School Y play each other in a competition. School X has eight more points than School Y. School X has three times a

s many points as School Y How many points does each school have?
Mathematics
2 answers:
lozanna [386]3 years ago
6 0
School X has 24 points and School Y has 8 points Hope this helps
koban [17]3 years ago
4 0

Answer:

Let point's possessed by school A = x

and point possessed by School B = y

And the statement given Regarding the school are :

School X has eight more points than School Y. School X has three times as many points as School Y .

Writing these statements in terms of equation

1.   x = y + 8

2.  x = 3 y

Substituting the value of x in y, we get

3 y = y + 8

Taking variable on left side of equation

3 y - y = 8

2 y= 8

y = \frac{8}{2}=4

As , x= y + 8 gives x = 4 + 8 = 12

Point possessed by School A = 12 points

Points possessed by school B =  4 points




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Random samples of size 64 are taken from an infinite population whose mean and standard deviation are 24 and 6.4, respectively.
umka2103 [35]

Answer:

Mean 24, standard error 0.8

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means with size n of at least 30 can be approximated to a normal distribution with mean \mu and standard deviation, also called standard error s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

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What are the mean and the standard error of the sample mean?

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4 0
3 years ago
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Alenkasestr [34]

Answer:

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Step-by-step explanation:

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8 0
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