2 years ago

Solve 11x-6y=3; 5x-8y=-25

Mathematics

1 answer:

Lemur [1.5K]2 years ago

3 0

Answer:

Step-by-step explanation:

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A superintendent of a school district conducted a survey to find out the level of job satisfaction among teachers. Out of 53 tea

frez [133]

Answer:

b. 1.15

Step-by-step explanation:

The z statistics is given by:

$Z = \frac{X - p}{s}$

In which X is the found proportion, p is the expected proportion, and s, which is the standard error is $s = \sqrt{\frac{p(1-p)}{n}}$

Out of 53 teachers who replied to the survey, 13 claim they are satisfied with their job.

This means that $X = \frac{13}{53} = 0.2453$

She find that the proportion of satisfied teachers nationally is 18.4%.

This means that $p = 0.184$

Standard error:

p = 0.184, n = 53.

$s = \sqrt{\frac{0.184*0.816}{53}} = 0.0532$

Z-statistic:

$Z = \frac{X - p}{s}$

$Z = \frac{0.2453 - 0.184}{0.0532}$

$Z = 1.15$

The correct answer is:

b. 1.15

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3 years ago

Which of the following statements is not true?

Verizon [17]

Whole numbers are the set of integers ranging from 0 - infinity. Natural numbers are the set of integers ranging from 1 - infinity. 0 is not a natural number but it is a whole number, so the second statement is false.

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2 years ago

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In a class of 40 students, 15 offer physics, 20 offer history and 3 offer both physics and history. How many student offer neith

Ainat [17]

Answer:

2 students.

Step-by-step explanation:

add together all of the students and then subtract that from 40.

20+15+3 = 38

40-38 = 2

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3 years ago

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What is 6x + 9^3 factorsied

ohaa [14]

Step-by-step explanation:

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2 years ago

What is the value of the expression 2w-2 when 5=w

ycow [4]

2w - 2
w = 5

2(5) - 2
10 - 2 = 8

The value would be 8

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2 years ago

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