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ziro4ka [17]
2 years ago
15

Write an expression for each sentence

Mathematics
1 answer:
Nitella [24]2 years ago
7 0

Answer:

  1. x^2+y
  2. 3(n-7)
  3. 37x-9.85

Step-by-step explanation:

1. If x represents a number, then x^2 represents its square. If y represents a second number, then the sum of that square and the second number is ...

  x^2 + y

__

2. The difference of a number (n) and 7 is (n-7). Three times that difference is ...

  3(n - 7)

__

3. If x represents a number, then the product of 37 and a number is 37x. 9.85 less than that is ...

  37x - 9.85

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Which of the following estimates at a 95% confidence level most likely comes from a small sample
Nikitich [7]

Answer:

Answer is c

Step-by-step explanation:

In hypothesis testing whether to accept or reject null hypothesis, normally we find one method as using confidence interval.  If the test statistic lies within confidence interval, we accept otherwise we reject.

For arriving confidence intervals we add and subtract margin of error from the mean we use in null hypothesis.

Margin of error = std error * critical value of test (Z or t etc)

For the same std deviation, std error = std dev/sq rt of sample size

Thus std error is inversely proportional to the square root of sample size.

If n becomes larger, std error becomes smaller and vice versa.

So margin of error increases for smaller sample size.

Since we have to select confidence level from a small sample, we have to select one which has the greatest margin of error=18

Hence answer is

c)  71%(+/-18%)

5 0
3 years ago
What is 21 over 40 in percent
Lorico [155]
52.5% or it can also be a decimal if needed its 0.525 
6 0
3 years ago
PLEASE HELP AGAIN ASAP!
Dovator [93]
15/5 goes to all of them..

15/5 = 3
8 0
3 years ago
*100 Points*
Effectus [21]

The expected outcome of spins based on the probability information is 60.

<h3>How to calculate the probability?</h3>

From the information, Joey decides to spin the wheel 60 times. Therefore, the expected outcome of spins is 60.

The thing that the booth owner can do to make the wheel more profitable for himself is to make winning probability less than that of losing.

Here, the booth owner do makes the wheel more profitable for himself as the winning is smaller.

Learn more about probability on:

brainly.com/question/24756209

#SPJ1

7 0
2 years ago
Evaluate the following: 3 to the power 2 ÷ (2 + 1). 2 3 4 5
olganol [36]

Answer:

3

Step-by-step explanation:

5 0
2 years ago
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