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lisov135 [29]
3 years ago
5

Variance is_________.

Mathematics
1 answer:
katrin [286]3 years ago
3 0

Answer:

B

Step-by-step explanation:

Variance can be said to be a measure of dispersion for a random sample.

Variance = pq/n

When given the variance, we can find the standard deviation.

Standard deviation = √variance

= √pq/n

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The power of 10 chart
TEA [102]
When you have powers of 10, the number is always 1 followed by how ever many zeros. So, in this case, 10 to the 4th power is 1 followed by 4 zeros, which is 10,000
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3 years ago
Find the value of x and y.
spayn [35]

By the geometric mean theorem,

\frac{y}{4}=\frac{12}{y} \\ \\ y^{2}=48 \\ \\ \boxed{y=4\sqrt{3}}

So, by the Pythagorean theorem,

12^{2}+(4\sqrt{3})^{2}=x^{2}\\\\144+48=x^{2}\\\\192=x^{2}\\\\\boxed{x=8\sqrt{3}}

7 0
2 years ago
Seema is travelling to Guernsey. She travels a distance of 3,800 km by plane to London and then another 400 km to Guernsey. Both
slava [35]

9514 1404 393

Answer:

  4 hours 40 minutes

Step-by-step explanation:

The appropriate relation is ...

  time = distance/speed

  time = (3800 km)/(900 km/h) +(400 km)/(900 km/h) = (38+4)/9 h

  = 14/3 h = 4 2/3 h

Seema's flight time is 4 hours 40 minutes.

__

2/3 of 60 minutes is 40 minutes

4 0
2 years ago
Explain how you know two triangles are the same
Zina [86]
Through SSS, SAS, ASA, HL, AAS
S=side
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4 0
3 years ago
Given f(x)= -2x -13, what is f(-3) -7?<br><br>A: -26<br>B: -14<br>C: -7<br>D: 0<br>E: 26
DochEvi [55]

Answer:

B: -14

Step-by-step explanation:

given that f(x) = -2x - 13,

we can find the value of f(-3) by simply plugging in -3 for x

f(-3) = -2(-3) - 13

f(-3) = -7

Because we are dealing with the expression f(-3) - 7, we still have one more step. Let's plug in -7 for f(-3)

- 7 - 7 = -14

Therefore, f(-3) - 7 will give us B: -14

4 0
3 years ago
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