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3 years ago

What is the formula for combinations

1 answer:

6 0

Note: , where nPr is the formula for permutations of n objects taken r at a time.Example:How many different committees of 4 students can be chosen from a group of 15?Answer:There are possible combinations of 4 students from a set of 15.There are 1365 different committees

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How to write (-6 '-5) and (3'1) in slope intercept

n200080 [17]

Answer:

You would first put it into point slope form which is (y-y_1)=m(x-x_1). Then you would solve for y.

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4 years ago

How to find area and circunferencr of a circle

Dennis_Churaev [7]

Answer:

To calculate the circumference of a circle, multiply the diameter of the circle with π (pi). The circumference can also be calculated by multiplying 2×radius with pi (π=3.14).

Step-by-step explanation:

np (: pls mark brainleist

7 0

3 years ago

Helllllppp!!!!!!!!!!!!11 marking brainliest!

aalyn [17]

Hello!

Let the unknown number be x.

Subtract 5:

x-5

Double the result: (multiply the result times 2):

2(x-5)

Hope everything is clear.

Let me know if you have any questions!

#KeepLearning

:-)

4 0

2 years ago

How do u solve (2how to solve 2 power to power 2

Ilia_Sergeevich [38]

Answer:

The answer is 4

Step-by-step explanation:

2² = 2 × 2

= 4

(Correct me if i am wrong)

8 0

3 years ago

Consider that the length of rectangle A is 21 cm and its width is 7 cm. Which rectangle is similar to rectangle A?

Greeley [361]

Question is incomplete, complete question is given below.

Consider that the length of rectangle A is 21 cm and its width is 7 cm. Which rectangle is similar to rectangle A? A) A rectangle with a length of 9 cm and a width of 3 cm. B) A rectangle with a length of 20 cm and a width of 10 cm. C) A rectangle with a length of 18 cm and a width of 9 cm. D) A rectangle with a length of 27 cm and a width of 3 cm.

Answer:

A) A rectangle with a length of 9 cm and a width of 3 cm.

Step-by-step explanation:

Given,

Length = 21 cm Width = 7 cm

$Ratio = \frac{Length}{Width}\\\\Ratio = \frac{21}{7}=3:1$

For the similarity of rectangle the ratio of length to width of any two rectangles should be equal.

So we have four options given;

A) A rectangle with a length of 9 cm and a width of 3 cm.

$Ratio =\frac{9}{3}=3:1$

Here the ratio is equal as of rectangle A. So this rectangle is similar to rectangle A.

B) A rectangle with a length of 20 cm and a width of 10 cm.

$Ratio =\frac{20}{10}=2:1$

Here the ratio is not equal as of rectangle A. So this rectangle is not similar to rectangle A.

C) A rectangle with a length of 18 cm and a width of 9 cm.

$Ratio =\frac{18}{9}=2:1$

Here the ratio is not equal as of rectangle A. So this rectangle is not similar to rectangle A.

D) A rectangle with a length of 27 cm and a width of 3 cm.

$Ratio =\frac{27}{3}=9:1$

Here the ratio is not equal as of rectangle A. So this rectangle is not similar to rectangle A.

Thus the correct option is A) A rectangle with a length of 9 cm and a width of 3 cm.

4 0

4 years ago