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
Luda [366]
3 years ago
11

A stack of 9 different cards are shuffled and spread out face down. If 4 cards are tired face up, how many different 4-card comb

inations are possible?
Mathematics
1 answer:
Juliette [100K]3 years ago
7 0

Answer:

126.

Step-by-step explanation:

This is the number of combinations of 4 cards  from 9 cards:

= 9C4

= 9! / 4! 5!.

A quick way of calculating this is  

9*8*7*6

----------- =   9*2*7   =    126 combinations.

4*3*2*1

You might be interested in
Which of the following expanded forms represents the number words one thousand, six hundred eighty-nine?
Arisa [49]
The answer is 1000+600+80+9. please give brainliest
5 0
2 years ago
PLEASE HELP ME!!!!!!
Sonja [21]

Answer:

\huge \red{ c_3 = - 1}

Step-by-step explanation:

c_1 = 1 \\  \\ c_n= - 2c_{n-1}+5 \\  \\ c_2 = - 2c_{2-1}+5 \\  \\ c_2 = - 2c_{1}+5 \\  \\ c_2 = - 2(1)+5 \\  \\ c_2 = - 2+5 \\  \\  \huge \purple{c_2 =3} \\  \\ c_3 = - 2c_{3-1}+5 \\  \\ c_3 = - 2c_{2}+5 \\  \\ c_3 = - 2(3)+5 \\  \\ c_3= - 6+5 \\  \\ \huge \red{ c_3 = - 1}

6 0
3 years ago
سر
densk [106]

Answer:

3cm

Step-by-step explanation:

A particular satellite is 15 m wide

Model of it was built with a scale of 1 cm: 5 m

=> scale of the model will be: 1/500cm and  A particular satellite is 1500 cm wide

=>1500*1/500=3(cm)

7 0
3 years ago
One T-shirt is sold for every 5 people who attend a concert. What is one way to write the unit rate in words?
liraira [26]

Answer : the answer is 5 people per T-shirt

Step-by-step explanation: because its 5 people per 1 T-shirt

3 0
3 years ago
What is the value of the expression x÷y when x = 30 and y = 18?
Eduardwww [97]

Answer:

5/3 or 1.66 or 1 2/3

Step-by-step explanation:

30/18 you can simply it to the factor of 6 or use a calc

5/3 if the person asks in fraction form and if they say that it can't be an improper fraction then it is 1 2/3 or get 1.6666 in calcutor

7 0
3 years ago
Other questions:
  • brett hoped to get 100 pumpkins from his garden this year. since the weather was favorable 20% more pumpkins grew then he xpecte
    5·1 answer
  • Pliz help me out :)():
    7·2 answers
  • If the measure of an angle is twenty less than the measure of its complement, what is the measure of the angle?
    13·1 answer
  • An isosceles triangle has a perimeter of 16. Two legs have length L an the center has a length of six. What is the area of the t
    14·1 answer
  • The LCM of 12, 18, and 24 is _____.
    7·1 answer
  • A computer valued at $800 depreciates at a rate of 14% every 6 months. What is the value of the computer after 13 months to the
    5·1 answer
  • C=5/9(f-32) given the temperature in August on a summer day is 33
    9·1 answer
  • What is the difference of 85.23 and 2.675?
    8·1 answer
  • A bar graph titled Games per month has month on the x-axis and number of games on the y-axis. January has 7 games; February, 5 g
    7·2 answers
  • Please help!
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!