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3 years ago

Which pairs of polygons are congruent?

Mathematics

2 answers:

VashaNatasha [74]3 years ago

4 0

Answer:

Congruent figures are the same size and the same shape.

We need an image to find which polygons are congruent. Could you give one and then i'll solve it?

Dominik [7]3 years ago

3 0

They are the same size and shape

Explanation: need picture to see

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Ivanshal [37]

1) 64

2) 1/8

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3 years ago

A running relay team ran a 400 meter race in a record-setting time of 36 seconds. What was their average speed to the nearest te

astraxan [27]

Distance = speed x time
speed = distance/time
time = distance / speed

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2 years ago

Which of the following is a negation for "There exists a real number x such that for all real numbers y, xy > y."1) There exi

baherus [9]

Answer:

1) There exists a real number x such that for all real numbers y, xy ≤ y.

Step-by-step explanation:

Given the statement:

"There exists a real number x such that for all real numbers y, xy > y"

The negation of the statement is:

"There exists a real number x such that for all real numbers y, xy ≤ y"

The correct option is 1

6 0

3 years ago

There has been a great deal of controversy over the last several years regarding what types of surveillance are appropriate to p

alexira [117]

Answer:

Given that a person was identified as a future terrorist, there is a 2.8544% probability that he/she actually is a future terrorist.

Step-by-step explanation:

There are 1000 future terrorists in a population of 300,000,000. So the probability that a randomly selected person in this population is a terrorist is:

$P = \frac{1,000}{300,000,000} = 0.000003 = 0.0003%$

So, we have these following probabilities:

A 99.9997% probability that a randomly chosen person is not a terrorist.

A 0.0003% probability that a randomly chosen person is a terrorist.

A 98% probability that a future terrorist is correctly identified

A 99.9% chance of correctly identifying someone who is not a future terrorist. This also means that there is a 0.01% probability of someone who is not a terrorist being identified as one.

This can be formulated as the following problem:

What is the probability of B happening, knowing that A has happened.

It can be calculated by the following formula

$P = \frac{P(B).P(A/B)}{P(A)}$

Where P(B) is the probability of B happening, P(A/B) is the probability of A happening knowing that B happened and P(A) is the probability of A happening.

Here we have:

What is the probability that the person is a terrorist, given that she was identified as a terrorist.

P(B) is the probability that the person is a terrorist. So $P(B) = 0.000003$

P(A/B) is the probability that the person was identified as a terrorist, given that she is a terrorist. The problem states that the system has a 98% chance of correctly identifying a future terrorist, so $P(A/B) = 0.98$