2. Select all ratios that are equivalent to 3:18. 21:126 6:36 1:6 1:18 15 21

When are two triangles said to be in perspective?

Softa [21]

Answer - A

Two triangles are said to be in perspective from a point, O if the corresponding vertices of the two triangles form three lines that intersect in that single point, O. The two triangles can also be described as homologic from point, O.

8 0

4 years ago

Solve for x What kind of angle Substitute back in

inna [77]

These 2 angles are supplementary so we have
x+ 88 + x + 108 = 180
2x + 196 = 180
2c = -16
x = -8

the 2 angles are -8+88 and -8+108

that is 80 and 100.

8 0

3 years ago

Is the following number rational or irrational?

maxonik [38]

Answer: Rational

Step-by-step explanation: Only numbers that go on infinitely like pi or the square root of 7 are irrational

3 0

4 years ago

What is 3x+1-x=5 answer quick

8090 [49]

Answer:

x=2

Step-by-step explanation:

3x+1-x=5

add like terms

2x+1=5

subtract 1 from both sides

2x=4

divide by 2 from both sides

x=2

4 0

3 years ago

Read 2 more answers

1. A poll conducted in 2018 found that 54% of US adult Twitter users get at least some news on Twitter. The standard error for t

Harrizon [31]

Answer:

The 99% confidence interval for the fraction of US adult Twitter users who get some news on Twitter is (0.4872, 0.6018). It means that we are 99% sure that the true proportion of US adult Twitter users who get some news on Twitter is between 0.4872 and 0.6018.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm zs$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ , and s is the standard error.

54% of US adult Twitter users get at least some news on Twitter.

This means that $\pi = 0.54$

The standard error for this estimate was 2.4%

This means that $s = 0.024$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$

The lower bound is:

$\pi - zs = 0.54 - 2.575*0.024 = 0.4782$

The upper bound is:

$\pi + zs = 0.54 + 2.575*0.024 = 0.6018$

The 99% confidence interval for the fraction of US adult Twitter users who get some news on Twitter is (0.4872, 0.6018). It means that we are 99% sure that the true proportion of US adult Twitter users who get some news on Twitter is between 0.4872 and 0.6018.

7 0

3 years ago