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Bingel [31]
3 years ago
5

Subtract the following. Write your answer in standard notation.* 18-92 X 10+

Mathematics
1 answer:
charle [14.2K]3 years ago
6 0

Answer:

-740

Step-by-step explanation:

18-72 equals -74

now -74 *10 equals-740

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Solve the equation X/6 +4=16
elena55 [62]

Answer:

x=160

Step-by-step explanation:

\frac{x}{6+4} =16

\frac{x}{10} =16

x=16 \times 10

x=160

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Answer:

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Step-by-step explanation:

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2 years ago
The mean SAT score in mathematics, M, is 600. The standard deviation of these scores is 48. A special preparation course claims
kupik [55]

Answer:

Step-by-step explanation:

The mean SAT score is \mu=600, we are going to call it \mu since it's the "true" mean

The standard deviation (we are going to call it \sigma) is

\sigma=48

Next they draw a random sample of n=70 students, and they got a mean score (denoted by \bar x) of \bar x=613

The test then boils down to the question if the score of 613 obtained by the students in the sample is statistically bigger that the "true" mean of 600.

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The test statistic for this type of test takes the form

t=\frac{| \mu -\bar x |} {\sigma/\sqrt{n}}

and this test statistic follows a normal distribution. This last part is quite important because it will tell us where to look for the critical value. The problem ask for a 0.05 significance level. Looking at the normal distribution table, the critical value that leaves .05% in the upper tail is 1.645.

With this we can then replace the values in the test statistic and compare it to the critical value of 1.645.

t=\frac{| \mu -\bar x |} {\sigma/\sqrt{n}}\\\\= \frac{| 600-613 |}{48/\sqrt(70}}\\\\= \frac{| 13 |}{48/8.367}\\\\= \frac{| 13 |}{5.737}\\\\=2.266\\

<h3>since 2.266>1.645 we  can reject the null hypothesis.</h3>
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IRISSAK [1]
<span>6 - 3(4 - 3x)
= 6 - 12 + 9x
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hope it helps</span>
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Natali [406]
1/4 , 1/2 , 2/3 , 5/6

I hope I helped you with your question
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3 years ago
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