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nlexa [21]
3 years ago
9

Ms. White has 15 students in her first grade class. Troy is the line leader for the week, and Mackenzie is last because she was

the line leader last week. In how many different ways can Ms. Whites class line up for lunch?
A.) 13!
B.) 15!
C.) 15!÷2!
Mathematics
2 answers:
Reil [10]3 years ago
7 0

Answer:

its 13!

Step-by-step explanation:

vladimir1956 [14]3 years ago
3 0
The first place and 15th place are already decided, so we have to find the number of <span>different ways that the </span>other<span> 13 students can line up, in the places from 2 to 14.</span>

2nd place can be any one of 13 people.  For each of those . . .

3rd place can be any one of 12 people.  For each of those . . .

4th place can be any one of 11 people.  For each of those

13th place can be any one of 2 people.  For each of those 

14th place has to be the one student who is left.

Total number of ways that 13 students can line up in places 2 through 14 is

(13 x 12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1)

<span>That number is called "thirteen factorial".  The number is </span>6,227,020,800<span> . </span>

<span>When you write it in math, you write it like this:</span><span>13</span>
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Anna11 [10]

Answer:

the answer is 28

Step-by-step explanation:

i guessed ngl

5 0
3 years ago
Anyone i need help with this
DIA [1.3K]

Answer:

Step-by-step explanation:

a1=90-a2

a1=90-30=60

a2 is opposite 30 and opposite angles are equal so

a2=30

The sum of the angles of a triangle are equal to 180 degrees.

a2+a3+70=180

a3+30+70=180

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a3=80

4 0
2 years ago
Marlon asks a friend to think of a number from 5-11. What is the probability that marlins friend will think of the number 9
Tju [1.3M]

Answer:

14.29% probability that Marlon's friend will think of the number 9

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

In this problem, we have that:

There are 7 numbers from 5 to 11(5,6,7,8,9,10,11)

9 is one of them

So

p = \frac{1}{7} = 0.1429

14.29% probability that Marlon's friend will think of the number 9

4 0
3 years ago
Will give brainliest
hoa [83]

Answer:

3,1,2

Step-by-step explanation:

I think it is 3,1,2 but I'm not completely sure lmk if it's correct or incorrect

~

 ̄ ̄ ̄ ̄\/ ̄ ̄ ̄

∧_∧

;;(´・ω・)

_旦_(っ(,,■)__

|l ̄l|| ̄じじ ̄|

6 0
2 years ago
X+ y + z = -3<br> 3y - Z = 4<br> 2x- y - 2z = -5
snow_lady [41]

Answer:

  • (-3, 1, -1)

Step-by-step explanation:

  • x + y + z = -3  --> (1)
  • 3y - z = 4   --> (2)
  • 2x - y - 2z = -5 --> (3)

<u>Add up (1) and (2)</u>

  • x + 3y + y + z - z = -3 + 4 ⇒ x + 4y = 1  --> (4)

<u>Double (2) and subtract from (3)</u>

  • 2x - y - 2z - 2(3y - z) = -5 - 2(4) ⇒ 2x - y - 2z - 6y + 2z = -5 - 8
  • 2x - 7y = -13 --> (5)

<u>Double (4) and subtract (5)</u>

  • 2(x + 4y) - 2x + 7y = 2 + 13 ⇒ 2x + 8y - 2x + 7y = 15 ⇒ 15y = 15 ⇒ y = 1

<u>Finding x</u>

  • x + 4(1) = 1 ⇒ x = 1 - 4  ⇒ x = -3

<u>Finding z</u>

  • -3 + 1 + z = -3 ⇒ z = -1

<u>So the answer is: </u>

  • (-3, 1, -1)

4 0
2 years ago
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