Mathematics Middle School

Use the combination formula to solve a problem when n = 7 and r = 5.



A. 21
B. 42
C. 84
D. 168

Answers

Answer 1
I might be wrong but I think it’s b sorry if wrong :)
Answer 2
THE ANSWER IS MOST LIKELY B.42

Related Questions

Frodo ran 2 3/5 miles in 7/12 of an hour. How many miles can Frodo run in one full hour?

Answers

To find how many miles he ran, we need to convert 7/12 of an hour to a full hour. To get a full hour, we must multiply 7/12 by 12/7. Knowing this, we need to multiply 2 3/5 miles by 12/7.

2 3/5 * 12/7

This would be

156/35 miles or 4 16/35 miles

the sides of a rectangle are in the ratio 2:5. if the longer side of the rectangle is 25.5 in., what are it's width, perimeter, and area ?

Answers

Answer: The width of the rectangle is 10.2 inches, the perimeter is 71.4 inches,  the area is 260.1 inches.

Step-by-step explanation:

25.5/5=5.1

5.1*2=10.2

The width is 10.2 inches

25.5*2+10.2*2=71.4

The perimeter is 71.4 inches

20.5*10.2=260.1

The area is 260.1

Width=10.2 in. Perimeter=71.4 in. Area=and 260.1 in.

Step-by-step explanation:

hope it helps

You toss one coin and roll one number cube. What is the probability the coin is heads and a 3 is rolled?

Answers

Answer:

1/6 for the cube and 1/2 for the coin

it would be 4/6 or 2/3 both are the same

Step-by-step explanation: sorry if im wrong btw

Answer:

Hello! answer: 1/12

Step-by-step explanation:

Heres a picture explaining the answer!

Carla and four of her friends went to the movie theater and found that there were only five seats left in the theater. How many different ways can Carla and her friends sit in these five seats?



A. 24
B. 120
C. 256
D. 396

Answers

Answer:

24

Step-by-step explanation:

Answer:B

Step-by-step explanation:

The number of different ways Carla and her friends can sit in the five seats can be calculated using the concept of permutations. Since there are 5 seats available and 5 people, each person can occupy one seat.

The number of ways to arrange the 5 people in the 5 seats can be calculated as 5 factorial (5!). The factorial of a number is the product of all positive integers less than or equal to that number.

5! = 5 * 4 * 3 * 2 * 1 = 120

Therefore, the correct answer is B. 120.

Hazel has 1 3\4 cups of rice. It takes 1 \8cup of rice to make one cup of chicken and rice soup. How many cups of chicken and rice soup can Hazel make if she uses all of her rice?

Answers

Answer: 3 1/8
Explanation: you do 13/4 - 1/8= 3 1/9
I think the answer is 3 1/8 ---> emphasis on the I tHiNk :^

Please I need this asap :)

Answers

i think its an hour i did the math fast in my head:)
It hour I had that question before and that the only right one

find the surface area of this triangular prism. be sure to include the correct unit in your answer. please helppp, thank youu!

Answers

I got 226.79. You could round the answer if necessary.

What is the mean of these numbers :
101,102,100,101,99

Answers

Answer:

100.6

Step-by-step explanation:

Answer: adding by 1 then subtract by 1 then add 1 then subtract 2

Step-by-step explanation:

Urgent answer correctly plz
Read the whole thing first

a bat and ball cost one dollar and ten cents. The bat costs one dollar more than the ball. How much does the ball cost?"
Every day, the patch of lilly pads doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?" 6÷2(1+2)
DDid oyu read it through just answer with Hello Bestie

Answers

the bat will cost one dollar because if the ball and the bat together cost 1.10 $ and the bat cost 1.00 more you will have 10 cents left over which will be how much the ball cost

it will take 24 takes for the lily pads to cover half of the lake because 48÷ 2 is 24

Solve the following equation when a = 3 and b = 2.
5a^2 − 10b + 9b =

Answers

The answer for this problem is 43
5(3)^2-10(2)+9(2)
15^2-20+18
225-20+18
=223

Find the value of the expression

h − 3

for h = 14.

Answers

Answer:

Math Expression =10

Step-by-step explanation:

Calculate the math expression for the given expression

15*(4/3)/2

=15*(1.33)/2

=19.95/2

=9.975

Please if you do both I will give brainiest (to the first one to answer)

Answers

Answer:

Answer to first:

Yes, x is a rational number.Yes, y is a rational number.Y is larger

Answer to second:

I know that -3.4 is a rational number because it is an integer or decimal not equal to zero.

Step-by-step explanation:

Explanations to first:

0.147 is rational because you can write it out.0.147 bar is rational because it can be written as a fraction.Y is larger because the numbers keep repeating, so it has a larger value than 0.147.

I need help on this darn dang question "The streets of Millston are laid out like a grid, with each square being the same size. The distance from the movie theater to a restaurant is 1/2 mile along Cabot Street. If there are Exactly 4 blocks between the two locations, how long is each block?"

Answers

Answer:

Each block is 1/8 of a mile long.

Step-by-step explanation:

i believe it will be 1/8

Anyone know what this is??

Answers

72 percent of them are the other color

Solve the x
-9 (1/2x - 3) = 45

Answers

Answer:

=

−

3

6

7

Step-by-step explanation:

Answer:

x = -4

Step-by-step explanation:

-9 (1/2x - 3) = 45

Divide both sides by -9

1/2x - 3 = -5

Add 3 to both sides

1/2x = -2

multiply both sides by 2

x = -4

PLEASE HELP
Find the volume of a cylinder that has the following dimensions. Do not round your answer. (Use 3.14 for π.)

radius: 5 cm
height: 0.25 m

volume = !!!!cm3!!!!

Answers

Answer:

i'm pretty sure 1.96×10-3 m³

is the right answer

V = pi r^2 h
Substitute in the values
= 3.14 x 5^2 x 0.25
= 19.625
Hope this helps, have a nice day! :)

Gary surveys all of his classmates for a project.
​
Select the two statistical questions that Gary could ask.
A. How many states are in the United States?
B. How old is your school?
C. In what year was the Declaration of Independence signed?
D. How many pets do you have?
E. What is your favorite flavor of ice cream?

PLZ HURRY WILL MARK BRAINLIEST

Answers

Answer:

A and D

Step-by-step explanation:

Statisical questions have to deal with numbers

B is age

C is year

E is a flavor of ice cream

A and D
Your welcome

Please help me!
I will give brainly

Answers

The answer is B) 22, 24, 26

Answer:

B

Step-by-step explanation:

You would find these answers by plugging in each of the numbers for x. B is the only one that when you plug in each of the numbers, the equation is true.

22 - 20 = 2

2 < 6

24 - 20 = 4

4 < 6

26 - 20 = 6

6 = 6

Hope this helps !! Have a good day! :)

A very exclusive college except approximately 2 students out of 5 applicants. If there were 250 total applicants, how many students were not accepted?

Answers

Answer:

150 students were not accepted.

Step-by-step explanation:

The ratio right now is 2 to 5 you would need to find an equal ratio with 250 as the second number. 5 is a factor of 250 because if you do 5 x 50 you get 250. So you would multiply 2 by 50 as well which is 100. The ratio is 100 to 250 with 100 being the students being accepted and 250 being the total number of people that applied. Though the question is asking for those that did not pass. If 100 people passed then everyone else out of 250 didn't and 250 - 100 is 150.

What is the median of these numbers :
65,56,76,65,52,89,41

Answers

Answer:

65

Step-by-step explanation:

You find the one equally in the center of the numbers after they are in order.

65 is the answer of the median n don’t know what else to right cause I need answers too

plz help and explain

Answers

Answer:

A regular polygon

B irregular polygon

C regular polygon

D not one

E regular one

F not one

Step-by-step explanation:

select the number line that shows that two opposite numbers have a sum of 0

Answers

Answer:

The correct answer would be D I believe.

Can I get brainliest?

Step-by-step explanation:

Answer: B

Step-by-step explanation:

6 and -6 are opposites. Number line B shows the equation 6 + -6 which equals 0 because they cancel eachother out.

can someone pls help

Answers

Answer:

D

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

Because they equal the same thing

What is the mean of these numbers :
6,7,7,8,8,4,7,6,4,6,8,7

Answers

Answer:6.5

Step-by-step explanation:

It is 6.5 because 6+7+7+8+8+4+7+6+4+6+8+7=78 and because their is 12 numbers than 78/12=6.5

The median is 7
Organize them smallest to largest and find the middle

plz last cry for help

Answers

Answer:

for the largest angle:

360-108-60-60= 132

since it is isosceles:

180-132=48

48 ÷ 2= 24

b=24

An art class is making a mural for their school which has a triangle drawn in the middle. The length of the bottom of the triangle isx . Another side is 4 more than four times the length of the bottom of the triangle. The last side is 10 more than the bottom of the triangle. Write and simplify an expression for the perimeter of the triangle.

Answers

The answer would be p = x + 4x+10 + x+3

Please answer this. Thanks

Answers

The answer is A 920squared

Answer:

960 ft

Step-by-step explanation:

I need help on this also could I get an explanation on how you solved it? Please don't take my points ill get u banned. :P

Answers

Answer:

1/2

Step-by-step explanation:

4 is the total right and 5/7 make it half so it will be 1/2. hope this helps!

1/16
Hope this helps, have a good day
^^

I need help! Tysm in advance. Giving 10 points for this

Answers

235 I’m pretty sure .

LINKS WILL be REPORTEd BRainly if correct

Answers

ACDG————————————————
All I know is the last one is correct and should be marked
This is because 30 and 20 are the most frequent numbers as seen in the dot plot.
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