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
sladkih [1.3K]
3 years ago
13

In how many ways can five children posing for a photograph line up in a row?

Mathematics
1 answer:
Shtirlitz [24]3 years ago
5 0

Answer:

number of ways = 120

Step-by-step explanation:

The number of ways five children can pose for a photograph line up in a row is given by the number of permutations of 5 elements in 5 different positions (positions in the line), then

number of ways = number of permutations of 5 elements = 5! = 5 * 4 * 3 * 2 * 1 = 120

Since the first children that occupies the line can be on any of the positions (5 positions) , but then the second one can choose any of the 4 remaining positions (since the first children had already occupied one) , the third can choose 3 ... and so on.

You might be interested in
Joseph has $60 in a savings account. Each week he deposits $12 in the account.
Aleonysh [2.5K]

Answer:

12x +60

Step-by-step explanation:

c

d

5 0
2 years ago
The excursion boat on the river takes 2½ hours to make the trip to a point 12 miles upstream and to return. If the rate at which
Orlov [11]

Answer:

2 mph

Step-by-step explanation:

time = distance / speed

Let c represent the rate of the current. Then the upstream rate of the boat relative to the shore is (5c -c) = 4c, and the <em>upstream time</em> is ...

... 12/(4c) = 3/c.

Likewise, the downstream rate is (5c +c) = 6c, and the <em>downstream time</em> is ...

... 12/(6c) = 2/c.

The <em>total time</em> is the sum of upstream and downstream times:

... 3/c +2/c = 2.5

... 5/c = 2.5 . . . . . . combine terms

... 5/2.5 = c = 2 . . . multiply by c/2.5

6 0
3 years ago
In triangle RST,angle R is a right angle .If TR = 6 and TS =8 what is the length of RS
mylen [45]
The length of RS is 10 because it's a 3-4-5 right triangle
3 0
3 years ago
Find the common ratio r for the geometric sequence and use r to find the next three terms.
lesantik [10]

Answer:

3240, 9720, 29160

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
3. Which rule represents a linear function? Check all
Nady [450]
The answer is C

The answer is C because the function form for a linear function is f(x) = ax+b and the answer C has x which is the slope and -3 which would represent the y-intercept also known as b
7 0
3 years ago
Other questions:
  • Let the random variable X denote the number of network blackouts in a day. The
    15·1 answer
  • Also this one! :( pls help again! thanks.
    8·1 answer
  • Solve 3(x-4)=-5 for x. Justify each step
    6·1 answer
  • -(-m - 8n)<br><br> Use the distributive property to simplify
    8·1 answer
  • Which of the following rational numbers is equal to 4.7 with a line on top of 7 ?
    9·1 answer
  • Can u guys help me on some of these please
    8·1 answer
  • A company plans to sell purses for $20 each. The company's business manager estimates that the
    12·1 answer
  • Find an equation for these points (-5,5) (4,2)
    11·1 answer
  • Which of the following sets of data is bimodal?
    14·1 answer
  • How many solutions do the systems of equations have?<br> y =-1/3 x + 9<br> y =- 2/6x
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!