Solve 5 over x plus 8 equals 3 over x for x and determine if the solution is extraneous or not.

Answers

Answer 1

Answer: The solution is extraneous.

Related Questions

A hypothesis will be used to test that a population mean equals 10 against the alternative that the population mean is more than 10 with known Ï. What is the critical value of z-score for the following significance levels?A) 0.01
B) 0.05
C) 0.10

Answers

Answer:

A) 2.58

B) 1.96

C) 1.65

Step-by-step explanation:

A hypothesis used to test that

$H_o : \mu = 10$

against the alternatives $H1 : \mu$ not equal to 10

if null hypothesis is true, then distribution of test statics follow

$Zo = (\bar x - \mu)/((\sigma)/(√(n)))$

for two sided alternatives hypothesis $( H1: \mu \neq 7)$ , then P value is

$P = 2[1- \phi(\left | Zc \right |)]$ (1)

a)significance level $\alpha = 0.01$

from 1 eq we get

$\pi (\left | Zc \right |) = P(Zo<\left | Zc \right |) = 1 - (0.01)/(2) = 0.995$

Therefore $\left | Zc \right | = 2.58$ FROM Z TABLE

B) significance level $\alpha = 0.05$

from 1st equation we get

$\pi (\left | Zc \right |) = P(Zo < \left | Zc \right |) = 1 - (0.05)/(2) = 0.975$

Therefore $\left | Zc \right | = 1.96$ FROM Z TABLE

C) significance level $\alpha = 0.10$

from 1 eq we get

$\pi (\left | Zc \right |) = P(Zo<\left | Zc \right |) = 1 - (0.10)/(2) = 0.95$

Therefore $\left | Zc \right | = 1.65$ FROM Z TABLE

Could this set of numbers represent the lengths of the sides of a right triangle? {5,9,13}

Answers

Answer:

Yes, it can

Step-by-step explanation:

Yes, the set of numbers {5, 9, 13} can represent the lengths of the sides of a right triangle. This set of numbers follows the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides.

In this case:

The length of one side is 5.

The length of the other side is 9.

The length of the hypotenuse is 13.

You can check if these numbers satisfy the Pythagorean theorem:

5^2 + 9^2 = 25 + 81 = 106

13^2 = 169

The set of numbers {5, 9, 13} does represent the lengths of the sides of a right triangle, as it satisfies the Pythagorean theorem.

Simplyfy the expression 4x+(15x+y) -11y

Answers

Steps to solve:

4x + (15x + y) - 11y

~Remove parenthesis and combine like terms

4x + 15x + y - 11y

19x - 10y

Best of Luck!

Answer:

(64x -11)/y

Step-by-step explanation:

Multiply 4x into the parenthesis.

60x + 4xy -11y

Divide by y.

(60x + 4x -11)/y

(64x -11)/y

What is the lateral surface area of a cube with side length 9 cm?

Answers

$a=9cm\n\nsurface\ area:A_S=6a^2\to A_S=6\cdot9^2=6\cdot81=486\ (cm^2)$

Pete is conducting a survey to determine his customers’ overall satisfaction about the quality of his company’s products. He sends out surveys to the 5 customers who have purchased the largest number of items over the past year. Are his results likely to be representative of the population he is trying to analyze?

Answers

No.
Because, when to do some sort of analysis (such as this one), you need to take (for example) a RANDOM SAMPLE from the POPULATION of the problem that is being analyzed. In this example (problem), Pete wants to evaluate OVERALL satisfaction of customers, so he should NOT send the surveys ONLY to the customers who have purchased the LARGEST number of items, but to the randomly selected customers, in order to obtain REPRESENTATIVE results of the OVERALL satisfaction. If he sends the surveys only to the customers who have bought the largest number of items, he will obtain VERY HIGH satisfaction of customers, as results, of course, and this will not be representative results.

No.

When trying to analyze an overall satisfaction with Quality of service. The number of population he is analyzing should not be limited to a certain factor. This would cause a narrow data information gather and would not represent the entire population. The surveys should be based randomly to avoid data bias/filters and actual results would be realistic.

The sum of 9 and three times a number is 21. What is the number?equation:

n =

Answers

To solve equations like this we need to do inverse operations.

First we need to build an equation: 9+3x=21

We pass the nine to the other side, subtracting the 9 to 21, that leaves us with 3x=12

After that we just divide 12 by 3, wich gives us x=4, or, as it says in the question: n=4

Now let's double check:

N=4, since 3*4=12 and 12+9=21

Hope it is helpful :)

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