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4 years ago

Construct two chords BC and DE that intersect in the interior of a circle at point F

Mathematics

1 answer:

joja [24]4 years ago

6 0

The diagram has been inserted below.

There is a circle.

Two chords, BC and DE intersect at a point F inside the circle.

A chord of a circle is a straight line segment whose endpoints both lie on the circle.

To know the chord length, we need to know the radius or central angle or the perpendicular distance to the center.

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a random sample of 4 claims are selected from a lot of 12 that has 3 nonconforming units. using the hypergeometric distribution

Sloan [31]

Answer:

The probability that the sample will contain exactly 0 nonconforming units is P=0.25.

The probability that the sample will contain exactly 1 nonconforming units is P=0.51.

Step-by-step explanation:

We have a sample of size n=4, taken out of a lot of N=12 units, where K=3 are non-conforming units.

We can write the probability mass function as:

$P(x=k)=\frac{\binom{K}{k}\binom{N-K}{n-k}}{\binom{N}{n}}$

where k is the number of non-conforming units on the sample of n=4.

We can calculate the probability of getting no non-conforming units (k=0) as:

$P(x=0)=\frac{\binom{3}{0}\binom{9}{4}}{\binom{12}{4}}=\frac{1*126}{495}=\frac{126}{495} = 0.25$

We can calculate the probability of getting one non-conforming units (k=1) as:

$P(x=1)=\frac{\binom{3}{1}\binom{9}{3}}{\binom{12}{4}}=\frac{3*84}{495}=\frac{252}{495} = 0.51$

5 0

4 years ago

Y=3x-1 for x=-2,1,0,1

Molodets [167]

Answer:

Step-by-step explanation:

For X=-2,

Y= 3x-1

Y= 3(-2) -1

Y= -6-1. = -7.

For X= 1

Y= 3(1)-1

Y= 3-1= 2

For X= 0

Y= 3(0)-1

Y= 0-1 = -1

For X= 1

Y= 3(1)-1

Y= 3-1= 2

6 0

3 years ago

A coin is tossed 20 times. It lands on heads 9 times. Compare the experimental and theoretical probabilities. If they are not cl

Nataly_w [17]

20×9=180 it says times .A coin is tossed 20 times

5 0

4 years ago

Read 2 more answers

A car traveled a distance of 126 miles in three hours traveling at the same speed what distance will the car travel in seven hou

Charra [1.4K]

Answer:

the correct answer would be 294 because you would have to divide 126/3 to find out how many miles per hour then multiply it by 7 for 7 hours

hope this help

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Please Help!!! Will Mark Brainliest!!!

Nady [450]

Answer:

Example 3. Same time problem: Upstream-Downstream.

First, let us explain the meaning of "upstream" and "downstream."

When a boat travels in the same direction as the current, we say that it is traveling downstream.

downstream

Thus if b is the speed of the boat in still water, and c is the speed of the current, then its total speed is

Downstream speed = b + c

When a boat travels against the current, it travels upstream.

upstream

In this case, its total speed is

Upstream speed = b − c

Problem. The speed of a boat in still water is 30 mph. It takes the same time for the boat to travel 5 miles upstream as it does to travel 10 miles downstream. Find the speed of the current.

Solution. The key to this type of problem is same time. That will give the equation,

Time upstream = Time downstream

Now, speed, or velocity, is distance divided by time -- so many miles per hour:

v = d

Therefore,

t = d

The equation will be

Time upstream = Time downstream

Distance upstream

Speed upstream = Distance downstream

Speed downstream

Let x be the speed of the current. Then according to the problem:

_5_

30 − x = 10

30 + x

Therefore,

5(30 + x) = 10(30 − x)

150 + 5x = 300 − 10x

5x + 10x = 300 − 150

15x = 150

x = 10 mph

Step-by-step explanation:

8 0

3 years ago