A high school principal randomly polls 50 freshmen, 50 sophomores, 50 juniors, and 50 seniors regarding policy changes for after-school activities. What type of sampling method is used?

Answers

Answer 1

Answer:

Answer: its systematic sampling

Step-by-step explanation:

Systematic sampling is a type of technique for creating a random probability sample in which each piece of data is chosen at a fixed interval for inclusion in the sample.

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What is the difference between a buffalo and a birthday cake?

Answers

Answer:

The buffalo is an animal and the birthday cake is a food.

Step-by-step explanation:

Hi, Buffaloes are heavily built oxen, with sparsely haired skin, large ears, long, tufted tails, broad muzzles and massive angulated horns. In having only 13 pairs of ribs they resemble the typical oxen. African buffaloes all have the hair of the back directed backwards.

A birthday cake is like a normal cake but made for the special celebration of birthdays.

A buffalo is a animal and a birthday cake is delicious food.

X^2−1.78x, if x=2.78

Answers

Answer:

2.78

Step-by-step explanation:

We are given the expression $x^2-1.78x$

As we know that x=2.78, we can plug that value into the expression and simplify it

$(2.78)^2-1.78(2.78)\n\n7.7284-4.9484\n\n2.78$

Multiply (5x2 x − 4)(x 2). 5x3 x2 − 4x − 8 5x3 11x2 − 2x − 8 5x3 10x2 − 4x − 8 5x3 20x2 2x − 8

Answers

(5x^2 + x - 4)(x + 2) = x(5x^2 + x - 4) + 2(5x^2 + x - 4) = 5x^3 + x^2 - 4x + 10x^2 + 2x - 8 = 5x^3 + 11x^2 - 2x - 8

Answer:

5x^3 + 11x^2 - 2x - 8

Step-by-step explanation:

took the test hope this helps please mark brainlisets

What's the missing side length on the triangle if side a=√33 and side b=4

Answers

Answer:

Step-by-step explanation:

to find the missing side length you use the pythagorean theorem $a^(2) +b^(2) = c^(2)$

so $(√(33) )^(2) + 4^(2) =49^(2)$ and then you take the square root of $49^(2)$ and you end up with an answer of 7.

Which inequality's graph will have a dashed boundary line?a x + 7y > 3

b 7x + y ≤ 3

c 6x − 5y ≥ 4

d y − x ≤ 3

Answers

dashed lines are having < or >

answer is A

What is the proportion of 7/5=k/18

Answers

the closes answer i got for k is 25.2

14/18 is the best answer

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Use the slope formula to find the missing coordinate. R(0, _), S(-4, 2) m = 5 a. 18 b. 22 c. -22

In a certain country, a letter up to 1 ounce requires postage in the amount of $0.42, and each additional ounce (or fraction of an ounce) has an additional cost. The function below represents the cost of mailing one letter in this country.f(c)=0.42 + 0.20[x-1] Josiah has two letters. The first weighs 2.9 ounces, and the second weighs 4.1 ounces. What is the total amount Josiah can expect to pay for postage? $1.62 $1.64 $1.84

Solve for x 5 x − 9 = 3 x + 3

May someone please tell me the answer