3 years ago

Which of these is an example of a non-random sample?

Mathematics

2 answers:

Fed [463]3 years ago

7 0

The answer would be c.lllllllllllllllllllllllll:)

Alexxx [7]3 years ago

5 0

Answer: C. it the answer i think

Step-by-step explanation:

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What is the solution to the rational equation x over 2x plus 1 minus 1 over 4 equals 2 over 2x plus 1

aalyn [17]

We want to solve
$\frac{x}{2x+1} - \frac{1}{4} = \frac{2}{2x+1}$

Subtract 2/(2x+1) from each side.
$\frac{x}{2x+1} - \frac{2}{2x+1y} - \frac{1}{4} = 0$

Add 1/4 to each side, and simplify the left side.
$\frac{x-2}{2x+1} = \frac{1}{4}$

Cross multiply.
4(x - 2) = 1(2x + 1)
4x - 8 = 2x + 1

Simplify and solve for x.
4x - 2x = 1 + 8
2x = 9
x = 9/2 or x = 4 1/2.

Answer: $x = \frac{9}{2} \,\, or \,\, x = 4 \frac{1}{2}$

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3 years ago

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Answer:

a) n+5

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3 years ago

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The velocity of a car was 30m/s when the driver pushed the brake of the car and it stopped after 2 seconds. Assume that the acce

Murljashka [212]

Answer:

the "acceleration" is -15m/s (it's negative because it is slowing down, not speeding up[it might just be a positive 15m/s if it is called deceleration and not acceleration])

Step-by-step explanation:

30m/s (starting speed)/2 (the number of seconds it took to stop from 30m/s

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3 years ago

If you are dealt 3 cards from a shuffled deck of 52 cards, find the probability that all 3 cards are queens.

oksian1 [2.3K]

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Sorry for the sloppy drawing but this is what it will look like
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