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3 years ago

If an image of a triangle is congruent to the pre-image, what is the scale factor of the dilation?

Mathematics

2 answers:

zhannawk [14.2K]3 years ago

8 0

Answer:

Step-by-step explanation:

A dilation of .1 or 1/2 would decrease the size. Since the numbers are smaller than zero the triangles would no longer be congruent. A dilation of 10 would increase the size of the triangle, causing the triangles to no longer be congruent. A scale fact of one is equivalent to the same size because 1 does not increase or decrease the size.

antiseptic1488 [7]3 years ago

4 0

Answer:

C. 1

Step-by-step explanation:

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A Rasmussen Reports survey of 1,000 US adults found that 42% believe raising the minimum wage will help the economy. Construct a

vitfil [10]

Answer:

(0.3798, 0.4602)

Step-by-step explanation:

Let p be the true proportion of US adults who believe raising the minimum wage will help the economy. A point estimate for p is $\hat{p}=0.42$ and a good aproximation (because we have a large sample) for the standard deviation of $\hat{p}$ is $\sqrt{\hat{p}(1-\hat{p})/n}=\sqrt{0.42(0.58)/1000}=0.0156$ . Therefore, a 99% confidence interval for p is given by $\hat{p}\pm z_{\alpha/2}\sqrt{\frac{\hat{p}(1-\hat{p})}{n}}$ where $\alpha=0.01$ and $z_{\alpha/2}$ is the $\alpha/2$ th quantile of the standard normal distribution, so we have, $0.42\pm z_{0.005}0.0156$ , i.e., $0.42\pm(-2.5758)(0.0156)$ or equivalently (0.3798, 0.4602).

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3 years ago

Somebody help me im stuck!! I suck at geometry

marta [7]

The answer would be c 8

4 0

3 years ago

Find the remainder of (x4 – 2) ÷ (x + 1).

prisoha [69]

Please write (x4 – 2) ÷ (x + 1) as <span>(x^4 – 2) ÷ (x + 1).

We can find the remainder using synth. div. as follows:

_________________
-1 / 1 0 0 0 -2
-1 1 -1 1
------------------------------
1 -1 1 -1 -1

The remainder is -1.</span>

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wel

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2 years ago

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