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Wittaler [7]
1 year ago
7

!ASAP! Please answer soon

Mathematics
1 answer:
yan [13]1 year ago
6 0

Answer:

1. Pyramid= ll+l^2  2. Rectangular prism= 2 lw+2lh+2wh 3. Cylinder= 2pi pi rh+2pi pi r^2  4.Triangular Prism= 2 B + Ph  5. Cone= Pi rl+ pi r^2

Step-by-step explanation:

Pretty sure this is your answer. Hope it helps!

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I will mark you as the brainiest if you get this correct<br> Thx so much xxx
solong [7]

Answer:

A= 168 minutes or 2 hours and 48 minutes.

B= 3 tyres

Step-by-step explanation:

4 0
2 years ago
Question 2
Free_Kalibri [48]
I’m terms of 12 in is the correct answer.
7 0
2 years ago
A small town has 2000 families. The average number of children per family is mu = 2.5, with a standard deviation sigma = 1.7. A
Nikitich [7]

Answer:

Let X the random variable that represent the number of children per fammili of a population, and for this case we know the following info:

Where \mu=2.5 and \sigma=1.7

We select a sample of n =64 >30 and we can apply the central limit theorem. From the central limit theorem we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And for this case the standard error would be:

\sigma_{\bar X} = \frac{1.7}{\sqrt{64}}= 0.2125

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

The central limit theorem states that "if we have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population with replacement, then the distribution of the sample means will be approximately normally distributed. This will hold true regardless of whether the source population is normal or skewed, provided the sample size is sufficiently large".

Solution to the problem

Let X the random variable that represent the number of children per fammili of a population, and for this case we know the following info:

Where \mu=2.5 and \sigma=1.7

We select a sample of n =64 >30 and we can apply the central limit theorem. From the central limit theorem we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And for this case the standard error would be:

\sigma_{\bar X} = \frac{1.7}{\sqrt{64}}= 0.2125

6 0
3 years ago
Plz help!!! It's on elimination its Algebra 1
koban [17]
2x-y=0 Y=x-1 2x-x-1=0 x-1=0
7 0
3 years ago
PLEASE ANSWERRRRRRRRRRRRRRRRR
zhannawk [14.2K]

The graph suggests that the two lines meet at (3,6)

If this is true, that point must belong to both lines.

To check this, plug x=3 in both equations, and you must get y=6 once you simplifiy all the numbers.

In the first equation we have

5\cdot 3-3y= -3 \iff 3y=15+3\iff 3y=18 \iff y=6

In the second,

3+3y=21 \iff 3y=18\iff y=6

6 0
3 years ago
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