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4 years ago

Which of the following expressions represents "the sum of n and the sum of 8 and 6"?

Mathematics

2 answers:

inessss [21]4 years ago

7 0

The sum of 8 and 6 is 8 + 6
The sum of n and the sum of 8 and 6 is n + (8 + 6)

So the answer is B

Goshia [24]4 years ago

4 0

Answer:

From the given expressions, n+ ( 8 + 6 ) is the correct expression to express the phrase "the sum of n and the sum of 8 and 6"

Step-by-step explanation:

We can express a phrases into mathematical expression by using basic operations.

We are given a phrase "the sum of n and the sum of 8 and 6".

We write it mathematically using operations.

the phrase "Sum of 8 and 6" is represented mathematically as 8 + 6

again , the phrases " sum of n and ( 8 + 6 ) can be represented as n+ ( 8 + 6 )

Thus, from the given expressions, n+ ( 8 + 6 ) is the correct expression to express the phrase "the sum of n and the sum of 8 and 6"

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3 years ago

The graph of f(x)=cos(x) is transformed to a new function, g(x) , by stretching it horizontally by a factor of 4 and shifting it

SpyIntel [72]

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3 years ago

Construct the confidence interval for the population mean mu. c = 0.90, x = 16.9, s = 9.0, and n = 45. A 90% confidence inte

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Answer:

The 90% confidence interval for population mean is $14.7 < \mu < 19.1$

Step-by-step explanation:

From the question we are told that

The sample mean is $\= x = 16.9$

The confidence level is $C = 0.90$

The sample size is $n = 45$

The standard deviation

Now given that the confidence level is 0.90 the level of significance is mathematically evaluated as

$\alpha = 1-0.90$

$\alpha = 0.10$

Next we obtain the critical value of $\frac{\alpha }{2}$ from the standardized normal distribution table. The values is $Z_{\frac{\alpha }{2} } = 1.645$

The reason we are obtaining critical values for $\frac{\alpha }{2}$ instead of that of $\alpha$ is because $\alpha$ represents the area under the normal curve where the confidence level 1 - $\alpha$ (90%) did not cover which include both the left and right tail while $\frac{\alpha }{2}$ is just considering the area of one tail which is what we required calculate the margin of error