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
shepuryov [24]
3 years ago
7

Three stamps can be attached to each other in various ways.how many ways might three stamps be attached?

Mathematics
1 answer:
ivanzaharov [21]3 years ago
8 0
Let's call the stamps A, B, and C. They can each be used only once. I assume all 3 must be used in each possible arrangement.
There are two ways to solve this. We can list each possible arrangement of stamps, or we can plug in the numbers to a formula. 
Let's find all possible arrangements first. We can easily start spouting out possible arrangements of the 3 stamps, but to make sure we find them all, let's go in alphabetical order. First, let's look at the arrangements that start with A:
ABC
ACB
There are no other ways to arrange 3 stamps with the first stamp being A. Let's look at the ways to arrange them starting with B:
BAC
BCA
Try finding the arrangements that start with C:
C_ _
C_ _
Or we can try a little formula; y×(y-1)×(y-2)×(y-3)...until the (y-x) = 1 where y=the number of items.
In this case there are 3 stamps, so y=3, and the formula looks like this: 3×(3-1)×(3-2).
Confused? Let me explain why it works.
There are 3 possibilities for the first stamp: A, B, or C. 
There are 2 possibilities for the second space: The two stamps that are not in the first space.
There is 1 possibility for the third space: the stamp not used in the first or second space. 
So the number of possibilities, in this case, is 3×2×1.
We can see that the number of ways that 3 stamps can be attached is the same regardless of method used.


You might be interested in
A seagull is 12 feet above the surface of the ocean. A fish is 3 feet below the surface of the water. How far apart are the seag
lara31 [8.8K]

Answer:

15

Step-by-step explanation:

12+3=15

4 0
2 years ago
Solve the equation. –x 8 3x = x – 6 x = –18 x = –14 x = 2 x = 4
LenKa [72]

The value of the variable x in the equation –x + 8 + 3x = x – 6 is - 14.

<h3>How to find variable in an equation?</h3>

The variables of an equation can be found as follows:

–x + 8 + 3x = x – 6

The variable in the equation is x.

Therefore,

–x + 8 + 3x = x – 6

combine like terms on the left side

-x + 3x + 8 = x - 6

2x + 8 = x - 6

subtract x form both sides of the equation

2x - x + 8 = - 6

x + 8 = -6

subtract 8 from both sides

x = -6 - 8

x = - 14

learn more on equation here: brainly.com/question/1347990

#SPJ4

3 0
2 years ago
Write 23 hundredths in scientific notation
Dmitry [639]

Answer:

Step-by-step explanation:

23 hundredths = 0.23 = 2.3 * 10⁻¹

8 0
3 years ago
What is two over four divided by one over two
Natasha2012 [34]

Answer:

0.25

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Raina must choose a number between 55 and 101 that is a multiple of 2,3 and 9. Write all the numbers that she could choose. If t
ziro4ka [17]

Answer:

72,90

Step-by-step explanation:

Since 9 is the biggest number so list multiples of 9 between 55- 101 range.

Which are 63, 72, 81, 90, 99. Any number that is a multiple of 9 is a multiple of 3 because 3x 3 = 9.  9 is a multiple of 3.

Any even number is a multiple of 2.

Only 72 and 90 are even numbers.

So 72 and 90 are numbers divisible by 2, 3, 9.

6 0
2 years ago
Other questions:
  • You have $5.85 to buy bananas to make banana bread. A banana costs $0.39. Which inequality represents the number x of bananas yo
    11·2 answers
  • 1. Provide two examples of a function: (1) as a table of values and (2) as a graph. Explain the definition of a function. Be sur
    15·1 answer
  • I need help asap thanks
    6·1 answer
  • 12x + 9 - 3x - 4. Please go fast!!!!
    13·2 answers
  • Susan is searching for a new apartment. Her monthly salary is $1,800, and she wants to spend no more than 35% of her budget on r
    8·1 answer
  • 1.
    14·2 answers
  • Assume that lines that appear to be tangent are tangent. O is the center of the circle. Find the value of x.
    15·1 answer
  • 6,291 DIVIDED BY 3 = ? <br> its easy i know lets see if your smart.
    12·2 answers
  • Use the discriminant to describe the roots of each equation. Then select the best description.
    10·2 answers
  • Question Help A 156-inch board is cut into two pieces. One piece is two times the length of the other. Find the length of the sh
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!