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3 years ago

Pls help me with this multiple choice !

Mathematics

1 answer:

s2008m [1.1K]3 years ago

3 0

Answer:

B. x = 14, y = 14

Step-by-step explanation:

Look up "45 45 90 triangle" to see rules that are consistent between all triangles like this.

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Which expression is equivalent to 2x - 10y + 9y - 11x ?

elena-s [515]

Answer:

-9x - y

Step-by-step explanation:

Combine like terms. That is, combine all the x terms and then, separately, combine all the y terms.

2x - 10y + 9y - 11x = -9x - y (answer)

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3 years ago

Brittany surveyed the students in three different Chemistry classes regarding the average number of hours of sleep they get each

aalyn [17]

Class B has the most consistant sleep because there is less of a difference between 6.87 and 3.65 than the other classes.

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3 years ago

Read 2 more answers

Lines p and q are perpendicullllar if the slope of line p is 2 what is the slope of line q

vodka [1.7K]

q= -1/2

perpendicular slopes are those that are opposite sign and reciprocal of the original given slope

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3 years ago

Le Saveu The UL health centre is giving a Pfizer vaccine to the surrounding community members of the 100 people who were vaccina

enot [183]

Using confidence interval concepts, it is found that the incorrect statement is given by:

B. The population proportion is 0.80.

In a sample of n people with a proportion of $\pi$ , and a confidence level of $1-\alpha$ , we the confidence interval for the proportion is:

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

In which z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

80 developed immunity out of 100, thus, the sample proportion is:

$\pi = \frac{80}{100} = 0.8$

Option A is correct.

The standard error is:

$s = \sqrt{\frac{\pi(1-\pi)}{n}}$

Considering $n = 100$

$s = \sqrt{\frac{0.8(0.2)}{100}} = 0.04$

Thus, statement E is correct.

90% confidence level, thus the critical value is the value of z that has a p-value of $1 - \frac{0.05}{2} = 0.975$ , so $z = 1.645$ , which means that statement D is correct.

The margin of error is:

$M = zs = 1.645(0.04) = 0.0658$

Thus, statement C is correct, which leaves B as the false statement, as we have the sample proportion, and we can only estimate, not guarantee the population proportion.

A similar problem is gien at brainly.com/question/16807970

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3 years ago

Bert has 10 books and he wants to give 2 of these books to his sister. How many different gifts are possible?

tia_tia [17]

Answer:

10 difderent gifts are possible

7 0

2 years ago