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4 years ago

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Which of the following equations has the given solution set? Solution set: Ø -2m + 5 = 2m + 5 -2m + 5 = -2m + 5 -2m + 5 = -2m -

5 2m + 5 = 2m + 5

2 answers:

DedPeter [7]4 years ago

6 0

<u>Which of the following equations has the given solution set?</u> <u>ANSWER: </u><u>-2m+5= -2m-5</u>

<em>Your Welcome ;)</em>

Alex787 [66]4 years ago

4 0

If I understand ur question, u r looking for a solution set with no solutions.
- 2m + 5 = - 2m - 5
-2m + 2m = -5 - 5
0 = -10 (incorrect...no solution)

u want the answer to be unequal with no variables. U do not want the answers to be equal, such as 0 = 0 or 10 = 10...because that would indicate infinite solutions. And u do not want the answer to contain a variable, because that would indicate 1 solution.

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Step-by-step explanation:

<u>Step 1: Combine on the right side </u>

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4 years ago

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Evaluate 7-\left(-19\right)-18+\left(-19\right)+187−(−19)−18+(−19)+187, minus, left parenthesis, minus, 19, right parenthesis, m

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Answer:

$345$

Step-by-step explanation:

$7-\left(-19\right)-18+\left(-19\right)+187-\left(-19\right)-18+\left(-19\right)+187$

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$26-18+\left(-19\right)+187-\left(-19\right)-18+\left(-19\right)+187$

$8+\left(-19\right)+187-\left(-19\right)-18+\left(-19\right)+187$

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4 years ago

kkurt [141]

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3 years ago

The poll found that 38% of a random sample of 1012 American adults said they believe in ghosts. What is the lower bound for a 90

Brrunno [24]

Answer:

The lower bound for a 90% confidence interval for the percentage of all American adults who believe in ghosts is 0.3549

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$n = 1012, \pi = 0.38$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.38 - 1.645\sqrt{\frac{0.38*0.62}{1012}} = 0.3549$

The lower bound for a 90% confidence interval for the percentage of all American adults who believe in ghosts is 0.3549

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4 years ago