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
Masja [62]
3 years ago
14

How many combinations of four books can be made from eight different books? 24 70 1,680?

Mathematics
1 answer:
djverab [1.8K]3 years ago
3 0

Answer:

70

Step-by-step explanation:

four books can be made from eight different books

4 books to be chosen from 8 books

The order does not matters so we use Combination.

four books can be made from eight different books, so we find 8C4

nCr= \frac{n!}{r!(n-r)!}

8C4= \frac{8!}{4!(8-4)!}

8C4= \frac{8!}{4!(4)!}

8C4= \frac{8*7*6*5*4!}{4!(4)!}=70

You might be interested in
Factor 16p^4 - 24p^3.
shusha [124]

Answer:

8p^3(2p - 3) is the factor

Step-by-step explanation:

3 0
3 years ago
All in standard Notation please :/ 2.09 x 10^5
Assoli18 [71]

9514 1404 393

Answer:

  • 209,000
  • 94,387
  • 0.0013

Step-by-step explanation:

Write the power of ten in standard form and do the multiplication.

  2.09 × 10^5 = 2.09 × 100,000 = 209,000

  9.4387 × 10^4 = 9.4387 × 10,000 = 94,387

  1.3 × 10^-3 = 1.3 × 0.001 = 0.0013

5 0
3 years ago
What is the explicit formula for the sequence below?<br><br> 4, -12, 36, -108 ...
liubo4ka [24]

Answer:x ×-3

Step-by-step 4×-3= -12

-12 × -3= 36

and so on

6 0
3 years ago
Read 2 more answers
What is the solution to the open sentence 18 = c + 6?
sveticcg [70]
This is very simple, all you have to do is subtract 18 and 6 and that would be 12, and now we have 12 as a POSSIBLE answer, lets check our work to be 100% correct so now try to add 12 and 6 and we get 18, so yay it made the equation true and since its true its right so that's the answer.

Answer: c = 12 so 18 = 12 + 6 is true.
4 0
3 years ago
Read 2 more answers
Define a Variable in a equation​
Vladimir [108]
A variable is a symbol that’s used in a number. It typically uses a variation of letters such as x,y,etc. for instance 3x=6
3 0
3 years ago
Other questions:
  • The graph below shows the function f(x)=x-3/x^2-2x-3 which statement is true
    8·2 answers
  • 3+5h-14 word phrase
    9·1 answer
  • Whats the answer to (7x+3)-(2x+1)
    11·1 answer
  • Express 5.03 as a fraction.
    12·2 answers
  • What are the slope and y-intercept of the following<br> equation?<br> 2x - 4y = 16
    14·1 answer
  • What is 10/2 equal to 1/5
    10·1 answer
  • Darren is on a super effective diet. He has lost 16% of his weight this month. If he started with 75 kg, how much does he weigh
    5·2 answers
  • Helppppppppp plzzzzz !!!!
    13·1 answer
  • Can you simplify -212+(-102)
    11·2 answers
  • What is the area in square units of the rectangle 3/4 and 2/5?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!