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sergey [27]
2 years ago
14

Which of the following is an example of a sample that would NOT be random?

Mathematics
1 answer:
Sloan [31]2 years ago
5 0

Answer: D

"Separating the students on the list into boys and girls and choosing a sample from each group that is proportional to the size of the group."

Step-by-step explanation:

You are sampling an equal amount of boys and girls since your getting an equal sample of each gender. (Not random)

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Which equation describes a parabola that opens up or down and whose vertex is at the point (h,v)
Serggg [28]

y  = a ( x - h)^2 + v             


a is positive when the parabola opens up  and negative when it opens down.
7 0
3 years ago
The graph of an absolute value function contains the points (1, 2), (0, 0), and (–1, 2). Shawn thinks the function this graph re
KATRIN_1 [288]

<span>In mathematics, the </span>absolute value<span> <span>or modulus. | x. | of a real number x is the non-negative </span></span>value<span> of x without regard to its sign. So both shawn and brielle are correct since both function will have the same answer, because it will just cancel out the sign.</span>

5 0
3 years ago
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George read 72% of a book. If he reads 270 pages how many pages are there in the book?
NISA [10]

Answer:

375 pages

Step-by-step explanation:

270 = 72%

=> 270/72 = 72/72

=> 3.75 = 1%

=> Number of Book pages = 375

Hoped this helped.

7 0
2 years ago
Consider the function f(x) = √5x + 15 for the domain [-3, ∞).Find f-¹(x), where f-1 is the inverse of f.Also state the domain of
Ymorist [56]

Answer: We have to find the inverse function of the following:

f(x)=\sqrt{5x+15}\rightarrow[-3,\infty)\Rightarrow(1)

The Inverse of the (1) is as follows:

\begin{gathered} f(x)=y=\sqrt{5x+15} \\  \\ \text{ Switch: }x\text{  and }y\text{ and solve for }y(x)\text{ } \\  \\  \\ y=\sqrt{5x+15}\rightarrow x=\sqrt{5y+15} \\  \\  \\ x^2=5y+15 \\  \\  \\ x^2-15=5y \\  \\  \\ y=\frac{x^2}{5}-\frac{15}{5} \\  \\  \\  \\ y=f^{-1}(x)=\frac{x^2}{5}-3 \\  \\  \\ f^{-1}(x)=\frac{x^{2}}{5}-3 \end{gathered}

The domain of the inverse function is:

x\in(-\infty,+\infty)

3 0
11 months ago
How to answer this question because i don’t understand
horrorfan [7]

Answer:

#1 THE LENGTH IS 24 FT, WIDTH IS 12 FT..... #2 DISTANCE IS 7

Step-by-step explanation:

ON PROBLEM ONE ITS SAYING FOR EVERY 1 CM ITS EQUALY TO 4 FEET, SO MULTIPLY 6CM*4 FEET OR 1*4  +  1*4  +  1*4  +  1*4  +  1*4  +1*4=24

YOU DO THE SAME FOR THE WIDTH WHICH WOULD BE 3CM*4FT=12

ITS THE SAME FOR THE SECOND PROBLEM TO YOUD DO 2*3 1/2=7

5 0
3 years ago
Read 2 more answers
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