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3 years ago

10

From 1000 students half being boys and half being girls 100 names were pulled out of a hat to complete a survey for school what

sampling method is being used?

2 answers:

Mama L [17]3 years ago

6 0

Random sampling. its where you pick or make a smaple at random

mojhsa [17]3 years ago

3 0

Answer:

The Random sampling method is being used.

Step-by-step explanation:

Consider the provided statement.

Random sample: If we select the subset of the individuals from the given set and the probability of getting selected for each individual is same, then it is known as the random sample.

There are 1000 students out of which 500 are boys and 500 are girls.

The probability of selecting a boy and a girl is the same.

If we pull out 100 names then the probability will be the same for the boys as well as for the girls.

Here, for each individual, the probability is the same.

Thus, the Random sampling method is being used.

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Which of the following equations has a solution x = 4? Select all that apply.

natka813 [3]

Answer:

$-2(3x - 4) = -16$ and $20- 15x = 6 - 2(4x + 7)$

<em></em>

Step-by-step explanation:

Given

$-2(3x - 4) = -16$

$\frac{1}{2}(10x + 2) = 6$

$20- 15x = 6 - 2(4x + 7)$

$\frac{1}{3}(9x - 12) + 6=-10$

Required

Equations with $x = 4$ as a solution

$-2(3x - 4) = -16$

Divide both sides by -2

$3x - 4 = 8$

Add 4 to both sides

$3x - 4 +4= 8+4$

$3x =12$

Divide both sides by 3

$x = 4$

$\frac{1}{2}(10x + 2) = 6$

Multiply both sides by 2

$10x + 2 = 12$

Subtract 2 from both sides

$10x + 2 -2= 12-2$

$10x = 10$

Divide both sides by 1

$x = 1$

$20- 15x = 6 - 2(4x + 7)$

Open bracket

$20 - 15x = 6 - 8x - 14$

Collect like terms

$8x - 15x = 6 - 14 - 20$

$-7x = -28$

Divide both sides by -7

$x = 4$

$\frac{1}{3}(9x - 12) + 6=-10$

Subtract 6 from both sides

$\frac{1}{3}(9x - 12) + 6-6=-10-6$

$\frac{1}{3}(9x - 12) =-16$

Multiply both sides by 3

$9x - 12 = -48$

Add 12 to both sides

$9x - 12 +12= -48+12$

$9x = -36$

Divide both sides by 4

$x =-4$

<em></em> $-2(3x - 4) = -16$ <em> and </em> $20- 15x = 6 - 2(4x + 7)$ <em> have </em> $x = 4$ <em> has a solution</em>

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Step-by-step explanation:

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2 years ago

A cube has a volume of 125 cube inches. what is the length of each edge

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Answer:

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Step-by-step explanation:

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3 years ago

A car needs fixing and Abe can fix it for $70 per hour with a $130 part, but Gabe can fix it for $80 an hour with a $40 part.How

patriot [66]

Answer:

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Abe's charge = Gabe's charge

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