Choose the correct formula for combination.
A . n!/r!(n-r)!
B. n!/(n-r)!

Answers

Answer 1

Answer:

B

Step-by-step explanation:

The number of combinations of n objects taken r at a time is determined by the following formula: C(n,r)=n!/(n−r)!

Answer 2

Answer: The answer is A n!/r!(n-r)!

search it up


Related Questions

Find the area of a circle with a radius of 8.
Either enter an exact answer in terms of 7 or use 3.14 for 1 and enter your answer as a decimal.
units2

Answers

Answer:

A = 64 pi

Step-by-step explanation:

The area of a circle is given by

A = pi r^2

The radius is 8

A = pi * 8^2

A = 64 pi

1. Find the slope of the line that goes through the points (2, 5) and (6, 7)

Answers

Answer:

[tex]\displaystyle m = \frac{1}{2}[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Algebra I

Coordinates (x, y)Slope Formula: [tex]\displaystyle m = \frac{y_2-y_1}{x_2-x_1}[/tex]

Step-by-step explanation:

Step 1: Define

Identify

Point (2, 5)

Point (6, 7)

Step 2: Find slope m

Substitute in points [Slope Formula]:                                                              [tex]\displaystyle m = \frac{7-5}{6-2}[/tex][Fraction] Subtract:                                                                                           [tex]\displaystyle m = \frac{2}{4}[/tex][Fraction] Simplify:                                                                                            [tex]\displaystyle m = \frac{1}{2}[/tex]

Two dice are rolled simultaneously and the difference of the numbers are
found.
(a) Draw a table to show all the possible outcomes after the rolling of the two
dice.

Answers

Answer:

Step-by-step explanation:

you can draw a table that has 7 rows and 7 columns, put the 6 numbers and their difference( 1-1=0, 1-2= -1, 1-3= -2,...)

-       1      2     3    4    5    6

1      0      1      2    3    4    5

2    -1      0      1     2    3    4

3    -2     -1     0     1     2    3

4    -3     -2    -1     0     1    2

5    -4     -3    -2    -1     0    1

6    -5    -4     -3    -2    -1   0

Can I get a good explanation on SAS Triangle Congruence? (35 points)

Answers

[tex]\huge{ \mathfrak{  \underline{ Answer} \:  \:  ✓ }}[/tex]

SAS is a congruency criteria which is used to prove that two triangles are congruent, if two corresponding sides and an angle between them is equal in both the triangles.

For example - In the attached picture,

KL = XY

∠KLM = ∠XYZ

LM = YZ

Therefore, ΔKLM ≅ ΔXYZ

(By SAS criteria)

[tex]\mathrm{ ☠ \: TeeNForeveR \:☠ }[/tex]

5. What can you conclude from the picture shown below? Select all that apply.

A. MZD= 130

B. ZB and C are vertical angles.

C. ZB and C are adjacent angles.

D. ZB and ZD are adjacent angles.

E. ZB and ZA are complementary angles.​

Answers

Answer:

A and B

Step-by-step explanation:

The answer for the question is A and B because 130+ 50=180 A line is equivalent to 180 degrees.B and C are opposites from each other so they are vertical.

A circle has a circumference of 3.14 units.

What is the diameter of the circle?

Answers

Answer:

1 unit

Step-by-step explanation:

divide by pi (3.14) to get the diameter of a circle

2x-y=0 3x=2y=-3


I’m not sure the correct steps to solve.

Answers

Answer:

x = 3 and y = 6

Step-by-step explanation:

The given equations are :

2x-y=0 ......(1)

3x-2y=-3 .....(2)

We need to solve equations (1) and (2).

Equation (1) can be written as :

2x = y

Put the value of y in equation (2)

3x-2(2x)=-3

3x-4x = -3

-x = -3

x = 3

Put the valye of x in equation (1)

2(3)-y=0

y = 6

Hence, the value of x = 3 and y = 6.

In a standard deck of 52 cards, what is the probability of drawing a club or a spade?
A: 25%
B: 50%
C: 100%

Answers

Answer:

B) 50%

Step-by-step explanation:

It says or so it includes both as a probability, since drawing one of the four suits is 25% adding them together would increase the probability for two either two suits to 50%

The answer is b since if you add them together they add up to 26 which is half of 52

I WILL GIVE BRAINLIEST IF ANSWER CORRECT

Solve the following inequality: 3 < x/2 + 1 *

Answers

Answer: x>9

Step-by-step explanation:

3 < x/2+1  

switch sides: x/2+1 > 3

Multiply sides by 3: 3x/2+1 > 3*3

Simplify: x>9

Order these numbers from least to greatest.


8.7, 8.6072, 8.67, 7.855

Answers

Answer:

7.855, 8.6072, 8.67, 8.7

Answer:

numbers from least to greatest.

are:

7.8558.60728.678.7

The Glendale Plaza Building in Glendale, California, is 353 feet tall. The U.S. Bank Tower in Los Angeles, California, is 1,017 feet tall. Which building is taller?​

Answers

Answer:

The U.S Bank Tower

Step-by-step explanation:

I hope this helps

Which statement best describes the use of a stimulation to predict the probability that two randomly chosen people will both have their birthdays on a monday

Answers

Answer:

The answer is "The Last choice".

Step-by-step explanation:

Please find the complete question in the attached file.

It is the phrase that perfectly represents the usage of a simulation for an estimate of the likelihood of the birthday of 2 randomly chosen persons on a Monday.

In a week there are 7 days, so seven choices are available, and just one Monday. Therefore, it is probable that [tex]\frac{1}{7}[/tex] will occur on a Monday to a birthday individual.

The first person will have a probability [tex]\frac{1}{7}[/tex].

The second person also has a probability [tex]\frac{1}{7}[/tex] .

You want to create a rectangular display board and line it with string lights. You want the lights to go along the two sides and the top, but not along the bottom. You have 40 feet of lights to use. What is the maximum size the display area can be to give the maximum area? What is the maximum display area?
pls help ily

Answers

Answer:

The maximum display area is 200sq. Ft. (square feet)

The maximum size of the lights is 20ft for the top and 10 ft for the sides

Step-by-step explanation:

I’m gonna delete this tmr because teacher checks this website I think

$(x^2-4x+2)^{x^2-5x+2} = 1.$
;PPP

Answers

The answer is in the picture

It shows how you kind of get the answer and kind of explains it.

Area of square is
a 2(l+b)
b l+b
c l²
d l³​

Answers

[tex] \huge \huge \huge\square[/tex]

Here All Sides Are Equal So,

Area = side × side= side²

So Assuming Side As 'l'

so, l×l = l²

Option C= l²

Hope This Helps You ❤️
OPTION C Is the best one i see

PLEASE ANSWER THISSSSSSSSSSSSSSSSSSSSS

Answers

Answer: A

Step-by-step explanation: Because there 3 data points in each quartile which are lower quartile, median, and upper quartile to form four groups in the dataset.

Choice B is not correct because you don't know how many people have no pets. Choice C is not correct because it is exactly 75% of people own one or more pets. Choice D is not correct because 3/4 have between 1 and 6 pets not 1/2.

Hope it helps :)

#1 determine the slope of :2x+4y=-16 ?
answer

Answers

Answer:

-1/2

Step-by-step explanation:

Find the slope by rearranging the equation into y = mx + b form, where m is the slope.

2x + 4y = -16

Subtract 2x from both sides:

4y = -2x - 16

Divide each side by 4:

y = -1/2x - 4

So, the slope is -1/2.

A right circular cone has a radius of 6 inches and a slant length of 10 inches. A right cylinder has a radius of 8 inches and a height of 12 inches. How many cones full of water are needed to fill the cylinder

Answers

Answer:

6.4  cones full of water

Step-by-step explanation:

Given data

Radius of cone= 6inches

Slant height= 10 inches

Volume of cone= 1/3πr^2h

V= 1/3*3.142*6^2*10

V=  1/3*3.142*36*10

V=  1/3*1131.12

V= 377.04 cubic inches

Radius of right cylinder= 8 inches

Height= 12 inches

Volume of cylinder= πr^2h

Volume= 3.142*8^2*12

Volume= 3.142*64*12

Volume=2413.056 cubic inches

Hence the number of cone full of water needed to fill the cylinder is

=Volume of cylinder/volume of cone

=2413.056/377.04

=6.4  cones full of water

please factor and find the zeros of each relation (18 marks)

C. y = 30x^2 + 44x +16
D. y = 10x^2 + 60x + 80

Answers

Answer:

[tex]C. \ \frac{-2}{3} , \ \frac{-4}{5}\\\\D. \ -2, \ -4[/tex]

Step-by-step explanation:

C.

[tex]30x^2 + 44x +16 = 0\\\\2(15x^2 + 22 + 8) = 0\\\\2(15x^2 + 12x + 10x + 8) = 0\\\\2(3x(5x + 4)+2(5x + 4))=0\\\\2((3x + 2)(5x + 4)) = 0\\\\Zeroes : 3x + 2 = 0 => x = \frac{-2}{3}\\[/tex]

             [tex]5x+ 4 = 0 => x = \frac{-4}{5}[/tex]

D.

[tex]10x^2 + 60x +80 = 0\\\\10(x^2 + 6x + 8)= 0\\\\10(x^2 + 4x + 2x + 8)=0\\\\10(x(x+4)+2(x+4))=0\\\\10((x+2)(x+4))=0\\\\Zeroes : x + 2 = 0 =>x = -2[/tex]

            [tex]x + 4 = 0 => x= -4[/tex]

Can someone help with this math question please?

Answers

08766896554 JVC dúo ctgfc bo

May someone please help me?

Answers

Answer:

The 3rd table

Step-by-step explanation:

The x values are dividing by 5 to  get the y values. The table is proportional because it's a pattern not just random values.

China consumes 4 x 10^9 tons of coal, while japan about 2 x 10^8 tons of coal. Approximately how many times the amount of that japan consumed did china consumed

Answers

Answer:

20 times

Step-by-step explanation:

This is calculated as:

The number of coal China consumes ÷ The number of coal Japan consumes

The number of coal China consumes =4 × 10⁹

The number of coal Japan consumes

= 2 × 10⁸

4 × 10⁹/2 × 10⁸

= 20 times

Plzzz HUURRYYY and pls explain

Complete the working to expand and simplify:
3x(4x + 2) + 3(x + 4) = 12x2 +
X +
X +

Answers

Use photo math my bro

Out of $132,624, how much money will be remaining with the company after purchasing 1184 hard drives for $112 each?

Answers

Answer:

$16

Step-by-step explanation:

Given data

Total amount= $132,624

Cost of each hard drive=  $112

Total number of hard drive=1184

Cost of all the hard drives=  112*1184

Cost of all the hard drives=$132608

Balance will be= 132,624-132608

Balance will be= $16

Help plz..And No links!! I repeat No links!!

Answers

Answer:

8,8 is correct answer please Like me

Answer:

Step-by-step explanation:

scale factor=4

The larger of two numbers is 15 more than three times the smaller number. If the sum of the two numbers is 63, find the numbers.

Answers

The larger number is 51 and the smaller number is 12 . ( hope this helped have a good day )

Two stores carry a similar stereo for the same original price and $573. Store A offers a 25% discount and the Store B sells the stereo for $446.94. Which store gives the bigger percent discount

Answers

Answer:

Razz

May 30, 2O21

100 - 16 = 84

.84*573 = 481.32

which is more than 458.40

PLEASE HELP PLEASE IM STUCK PLEASEEE

Answers

Answer:

Step-by-step explanation:

since it's a square we know the two sides are equal.  So set them equal and solve for X

a)

4x + 3 = 3x +17

4x-3x = 17 -3

x = 14

Since we now know X  plug it into the expression for the angle

b)

5(14) + 4y = 90    ( 90°  b/c we know the angle is equal to that )

70 4y = 90

4y = 90-70

4y = 20

y = 20/4

y = 5

c)

we can find the perimeter by just plugging in X to either of the expressions for the side and then multiplying that by 4,  since there are 4 sides

4(14) +3

56 +3

59

now times 4 for each side

59*4= 236

The number of apple slices placed in 5 different pies is listed below. 94, 90, 82, 94, 85 What is the difference between the mean and the mode of these numbers?

Answers

Answer:

Mode: 94

Mean: 89

Difference between them: 5

Step-by-step explanation:

Solve this problem and I will give you a brainliest (up)

Answers

x=1
3x-5=-2
3(1)-5=-2
3-5=-2
-2=-2

Answer:

x < 1

x > -1

Step-by-step explanation:

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