1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mila [183]
3 years ago
14

A magician performing a magic act has asked for 2 volunteers from the audience to help with his routine. If there are 250 people

in the audience, which of the following expressions represents the number of possible pairs of volunteers?
Mathematics
2 answers:
Kay [80]3 years ago
6 0

Solution:

Number of people in the audience = 250

Number of Volunteers to be chosen from 250 volunteers = 2

As this can be done by choosing 2 people out of 250 peoples , the order is not important.

So , we will use combinatorics for this method, because order does not matter here.

So Possible combination= _{2}^{250}\textrm{C}

  =  \frac{250!}{248!\times 2!}=249 \times 125

  = 31125 ways


RUDIKE [14]3 years ago
5 0
The answer is 125. If you were to pair 250 people in 2, that would be 250 divided by 2. And 250 divided by 2 is 125.
You might be interested in
Ben, Tim, and Sam have to do a certain job. Ben can finish the job in 5 hours. Tim can finish the job in 6 hours. Sam can finish
Brut [27]

x is 7.5 hours

Step-by-step explanation:

Ben, Tim, and Sam have to do a certain job

  • Ben can finish the job in 5 hours
  • Tim can finish the job in 6 hours
  • Sam can finish the job in x hours
  • The three of them can finish the job in 2 hours if they work together

We need to find x

∵ Ben can finish the job in 5 hours

∴ The rate of Ben = \frac{1}{5}

∵ Tim can finish the job in 6 hours

∴ The rate of Tim = \frac{1}{6}

∵ Sam can finish the job in x hours

∴ The rate of Sam = \frac{1}{x}

They will working together to finish the job in two hours, that means the sum of their rate is equal to 1/2

∵ They can finish the job in 2 hours if they work together

∴ \frac{1}{5}+\frac{1}{6}+\frac{1}{x}=\frac{1}{2}

To add the fractions find the LCM for all denominators to make all fractions with same denominators

∵ The LCM of 5, 6 ans x is (5 × 6 × x) = 30 x,

- Divide it by each denominator to find the new numerators

∵ 30 x ÷ 5 = 6 x , 30 x ÷ 6 = 5 x , 30 x ÷ x = 30

- Change all the denominators to 30 x and then write the new

   numerators of each fraction

∴ \frac{6x}{30x}+\frac{5x}{30x}+\frac{30}{30x}=\frac{1}{2}

Add the numerators and put the sum over 30 x

∵ \frac{11x+30}{30x}=\frac{1}{2}

- By using cross multiplication

∴ 2(11 x + 30) = 1(30 x)

- Simplify the both sides

∴ 22 x + 60 = 30 x

- Subtract 22 x from both sides

∴ 60 = 8 x

- Divide both sides by 8

∴ 7.5 = x

∴ The value of x is 7.5 hours

x is 7.5 hours

Learn more:

You can learn more about the word problems in brainly.com/question/10712420

#LearnwithBrainly

5 0
3 years ago
Factor completely: <br> x^3 - x^2 - 6x
PSYCHO15rus [73]

Answer:

x(x-3)(x+2)

Step-by-step explanation:

1. Find the GCF (Greatest Common Factor)

GCF=x

2. Factor out the GCF and simplify.

x(x^{2} -x-6)

3. Factor x^{2} -x-6.

Which two numbers add up to -1 and multiply to -6?

<u>-3 and 2</u>

Rewrite the expression using the numbers above.

(x-3)(x+2)

4. Done!

x(x-3)(x+2)

4 0
2 years ago
If the point (b,15) lies on the straight line with equation Y=5x fonde the value of b ?
Andrej [43]

Answer:

b = 3

Step-by-step explanation:

Substitute the y- coordinate 15 into the equation , that is

15 = 5x ( divide both sides by 5 )

3 = x

This is the x- coordinate of the point , so b = 3

7 0
2 years ago
Find the nth term of the following sequence: 7, 13, 19, 25,
Natalija [7]
The answer of the next term is 31
8 0
2 years ago
Read 2 more answers
A. If a spacecraft was parked on Venus and needed to make a flight to Jupiter, how far would it need to travel? Show your work a
ivann1987 [24]

Answer:

not sure

Step-by-step explanation:

hope it helps and use brainly it never lies

8 0
3 years ago
Other questions:
  • Choose the system of equations that matches the following graph: picture of coordinate plane with line y equals 1 over 4 x plus
    15·2 answers
  • Given through: (2,4), and slope=4 how do you write the slope-intercept?
    11·2 answers
  • Which of the following is equal to the fraction below? (4/5)^6
    8·1 answer
  • Five times the sum of a number and 3 is the same as 3 multiplied by 1 less than twice the number. What is the number?
    7·1 answer
  • In the figure, lines l, m, and n are parallel. A classmate says you can use the corollary to the side-splitter theorem to find x
    13·1 answer
  • Maya was asked to find 70% of 400. what steps should she complete to find the missing part
    7·1 answer
  • Write the​ slope-intercept form of the equation of the line satisfying the given conditions. through ​(1 ​,6​); slope negative 4
    12·1 answer
  • Which number is a solution of the inequality? X+4&lt;7
    8·1 answer
  • Will mark BRAINLIEST for correct answer
    7·1 answer
  • X divided by 6/7 = 3 and 3/4
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!