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2 years ago

Triangle ABC was dilated by 50%. AC 6 what is AC? A) 3 B) 6 c) 12 d) 15

Mathematics

2 answers:

Leviafan [203]2 years ago

6 0

Answer:

a)3

Step-by-step explanation:

given the triangle abc,if the side ac is 6

the side ac=6

if it is dilated by 50%,then the resulting pre-image is exressed as;

a'c=0.5(6)

a'c=3

hence the side after dilation is 3

Zielflug [23.3K]2 years ago

6 0

Answer: 3

Step-by-step explanation:

its just how it is

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The average number of hours of sleep per night was 9.46 hours for a sample of 104 five to seven year-old children. The number 9.

alexgriva [62]

Answer:

Statistic

Step-by-step explanation:

Since, a characteristic of a sample is called statistic. It is used to estimate the value of a population parameter and can be computed from the sample.

Here, the sample is 104 children,

For which the average number of hours of sleep per night was 9.46 hours,

∵ 9.46 is the number that can be computed from the sample of 97 children.

Hence, the number 9.46 is a Statistic

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3 years ago

Henrys birthday is in 3 weeks how many days until henry birthday

lana66690 [7]

Answer:

21 days

Step-by-step explanation:

in one week, there are 7 days

hence in 3 weeks, there are 7 x 3 = 21 days

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4 years ago

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The length of a rectangle if the length is twice the size of the width increased by one

nadezda [96]

Answer:

I'm not confident on this but:

L = 2(W + 1)

Hopefully this might help somewhat :]

L: Length

W: Width

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3 years ago

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What should a size of a sample be in order to have a margin of error of 4% for a 90% confidence level from a population with a s

vagabundo [1.1K]

Answer:

We need a sample size of 2,071,800 or higher.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$

Now, we find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

In this problem:

We need a sample size of n or higher, when $M = 0.04, \sigma = 35$ . So

$M = z*\frac{\sigma}{\sqrt{n}}$

$0.04 = 1.645*\frac{35}{\sqrt{n}}$

$0.04\sqrt{n} = 1.645*35$

$0.04\sqrt{n} = 57.575$

$\sqrt{n} = 1439.375$

$\sqrt{n}^{2} = (1439.375)^{2}$

$n = 2,071,800$

We need a sample size of 2,071,800 or higher.

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3 years ago

Determine where f(x) = g(x) from the graph.

Anna35 [415]

Answer:

C. X=-2,2

Step-by-step explanation:

At these 2 points, we can see the graphs are the same point.

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3 years ago