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
jeka94
3 years ago
13

Sara has six necklaces, but her mother will only allow her to wear two at a time. How many different combinations of two necklac

es can Sara wear?
Mathematics
2 answers:
MatroZZZ [7]3 years ago
6 0

Answer:

15 different combinations

Step-by-step explanation:

Sara has six necklaces, but her mother will allow her to wear two at a time.

So we calculate different combinations of two necklaces by this formula:

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

Where n = 6 and r = 2

Now put the values

\frac{6!}{2!(6-2)!}

\frac{6\times 5\times 4\times 3\times 2\times 1}{2!(6-2)!}

\frac{720}{2\times 1(4)!}

\frac{720}{2\times 1(4\times 3\times 2\times 1)}

\frac{720}{2(24)}

\frac{720}{48} = 15 combinations

Sara can wear 15 different combinations of two necklaces.

GuDViN [60]3 years ago
5 0

6C2 = (6 x5)/(2 x 1) = 15 difference combinations

You might be interested in
A pound of chocolate costs 6 dollars. Diane buys P pounds. Write an equation to represent the total cost c that Diane pays.
postnew [5]

Answer:

C=6P

Step-by-step explanation:

Because the cost (c) depends on the pounds (p), we have to multiple the weight by 6, because it is $6 per pound.

7 0
3 years ago
Which expression is equivalent to 5(d+1)
timurjin [86]

the answer you are looking for is 5d+5

5 0
3 years ago
Read 2 more answers
Given the endpoint A(1, 3) and the midpoint C(6, 2), find the other endpoint B(x, y).
Tpy6a [65]

Right away we know we don't have fractions; the midpoint is the average of the coordinates, so if it and one endpoint are integers so is the other endpoint.

We can do a kind of point arithmetic:

C = (A+B)/2

2C = A+B

B = 2C - A

B = 2(6,1) - (1,3) = (12,2)-(1,3)=(11,-1)

Answer: That's none of the above, but a typo away from the first choice.

6 0
3 years ago
Find the quotient 6/11 divided by 2/5
Archy [21]

Answer:

1 4/11 or 1.36

Step-by-step explanation:

6/11 ÷ 2/5

6/11 x 5/2 = 30/22

30/22 > 15/11

15/11 = 1 4/11

5 0
3 years ago
Round<br> your answer to the nearest tenth.<br> (2,4) and (5,10)
saw5 [17]

<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3

Answer:

6.7

<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3

7 0
3 years ago
Other questions:
  • Allen is trying for a track me she ran 2 1/4 miles five times this week how far did Marilyn run this week
    5·2 answers
  • Answer two questions about Equations AAA and BBB:
    13·1 answer
  • The area of the circle is 78.5 units. What is the radius? Use 3.14 for pi.
    5·1 answer
  • When a quadratic equation has a repeated solution?
    5·1 answer
  • Can someone help me plesssss
    7·2 answers
  • During a field trip to a local soda
    15·1 answer
  • Write an equation in slope-intercept form
    11·1 answer
  • When Jake's puppy was born she weighed 1.2 pounds in two months she weighed 11.15 pounds how much weight did Jack jacks pub agai
    8·2 answers
  • What is the volume please explain your answer
    8·1 answer
  • HELPPPPP<br> Consider the function below. Find f(8)
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!