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
Rashid [163]
4 years ago
11

How many ways can a group of 8 students be selected from 9 students?

Mathematics
1 answer:
antoniya [11.8K]4 years ago
7 0
9!/(8!*(9-8)!)=9
or just use a calculator and use the nCr function
You might be interested in
Given the sequence 10, 20, 40, 80,.... find 25th term​
Contact [7]
This sequence is a geometric sequence so u want to find out the formula

The formula for a geometric sequence is: ar to the power of n-1

A= first term and r= the factor between the terms (called the common ratio)

Now we juss input it in the formula

10 x 2 to the power of n-1

Now we want to work out the 25th term so n=25 we do 25-1=24

So it’s 10*2 to the power of 24

Answer: 167772160

Hope this helped
8 0
3 years ago
Read 2 more answers
Solve for w, x, y, z
Sergeu [11.5K]

Answer:

x= 1; y= 0; z= -2 and w= 3.

Step-by-step explanation:

Given that,

1) x + 2y - z = 3

2) 2x - y + z - w = -3

3) y + 2z - w = -7

4) x + 3y + 2z + 2w = 3 ​

now, from 1) z = x + 2y -3 →→(5)

from 2) w = 2x -y + z +3

         ⇒w = 2x -y + x + 2y -3 +3  (from (5))

            w = 3x + y →→(6)

Now substitute (5) and (6) in 3), we get

y +2(x + 2y -3) - (3x + y) = -7

⇒ 4y - x = -1 →→→(7)

Now substitute (5) and (6) in 4), we get

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

⇒ 9x +9y = 9

⇒ x + y =1 →→→(8)

⇒ x= 1-y , substituting this in (7) gives 5y -1 = -1

⇒ y = 0 and x = 1

substituting these values in

(5) and (6) gives, z = -2 and w = 3

⇒ x= 1; y= 0; z= -2 and w= 3.

5 0
3 years ago
3. State if each statement is correct. If it is not correct, then fix the mistake.
olya-2409 [2.1K]

Answer:

All are incorrect

Step-by-step explanation:

Required

Determine which is correct or not

(a)\ 2x * 2x = 4x

This is incorrect because:

2x * 2x = 2 * 2 * x*x

2x * 2x = 4x^2 ---- fixed

(b)\ 3x^3 * 3x^3 = 9x^9

This is incorrect because:

3x^3 * 3x^3 = 3 * 3 * x^3 * x^3

3x^3 * 3x^3 = 9x^(3+3)

3x^3 * 3x^3 = 9x^6 ---- fixed

(c)\ 4x(4x + 5) =8x + 5

This is incorrect because:

4x(4x + 5) =4x * 4x + 4x * 5

4x(4x + 5) =16x^2 + 20x ---- fixed

4 0
3 years ago
Given the function: j(x)=x^2+3x-4 ... Match the description with the critical point.
Assoli18 [71]

Answer:

1

Step-by-step explanation:

3 0
3 years ago
Nike is having a 20% off sale on all of their sneakers. If a pair of sneakers normally costs $89, how much will it be during the
7nadin3 [17]

Answer:

$71.20

Step-by-step explanation:

Multiply 89 to .2 and you get 17.8 then you subtract that from the originat cost.

6 0
3 years ago
Other questions:
  • How long is a billion seconds?
    13·2 answers
  • How do you find the range of a function that’s represented by a graph?
    5·1 answer
  • I NEED HELP PLEASE!
    12·1 answer
  • WRITE THREE ratios equivalent to the given ratios 8/10
    6·1 answer
  • How to solve 5s+7−2s=16
    8·2 answers
  • Johann buys 3 flats of flowers, he plants 2/5 of the flowers and then he dividends the remaining among his 5 friends. What fract
    11·1 answer
  • Solve for x in the diagram below.<br> 200<br> (3x + 10°
    10·2 answers
  • Foster’s answer to the question he wrote for Ranger was 7x+(-3), while Ranger’s answer was 7x-3.They both checked their work by
    6·1 answer
  • Ruby's market sells smoked meat by the pound. the prices fir several different meats shown in the table. Brad has 10$ to spend a
    11·1 answer
  • Equivalent equation for x/5+1=-6​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!