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Leni [432]
2 years ago
9

14.4 .3 Two students are needed to work in the school store during the lunch hour every day, and four students volunteer for thi

s work. What is the greatest number of days that can be arranged in which no pair of the four students work together more than once?
Mathematics
1 answer:
Ray Of Light [21]2 years ago
6 0

Answer:

6

Step-by-step explanation:

=4!/(4-2)!2!

=4x3x2x1/2x2

=12/2

=6

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If (x^2 - y^2 = 10 and (x + y) =2 find x and y?
vampirchik [111]

Answer:

x = 3.5 ; y = -1.5

Step-by-step explanation:

5 0
2 years ago
Factorise 3x^2-6x<br> Thanksssss
9966 [12]

Answer:

3x(x - 2)

Step-by-step explanation:

Given

3x² - 6x ← factor out the common factor 3x from each term

= 3x(x - 2)

8 0
3 years ago
Read 2 more answers
Find the ordered triple of these equations. 2x + 5y - 3z = -5 3x + 2y + 7z = 15 5x - 4y + 6z = 34
svetoff [14.1K]
<h2>Ordered triple are (4,-2,1)</h2>

Step-by-step explanation:

We need to find ordered triple of  2x + 5y - 3z = -5 , 3x + 2y + 7z = 15 and 5x - 4y + 6z = 34

     2x + 5y - 3z = -5 -------------------------eqn 1

     3x + 2y + 7z = 15 -------------------------eqn 2

     5x - 4y + 6z = 34 -------------------------eqn 3

eqn 1 + eqn 2

     5x + 7y + 4z = 10 -------------------------eqn 4

eqn 4 - eqn 3

     11y - 2z = -24 -------------------------eqn 5

eqn 1 x 3

     6x + 15y - 9z = -15 -------------------------eqn 6

eqn 2 x 2

     6x + 4y + 14z = 30 -------------------------eqn 7

eqn 7 - eqn 6

     -11y + 23z = 45 -------------------------eqn 8

eqn 5 + eqn 8

           21 z = 21

                z = 1

Substituting in eqn 8

       -11y + 23 x 1 = 45

         -11 y = 22

              y = -2

Substituting in eqn 1

        2x + 5 x -2 - 3 x 1 = -5

        2x = 8

          x = 4

Ordered triple are (4,-2,1)

3 0
4 years ago
A submarine is descending 2100 feet below the surface .It took 2 hours write an equation to represent the submarines elevation a
yawa3891 [41]

Answer:

-1050

Step-by-step explanation:

I know the answer because descending means going down so 2100 is the big number and its negative to if you do -2100 divided by 2 then you will get -1050.

4 0
3 years ago
Which set of data has the weakest linear association?
motikmotik
The top left-hand corner set of data has the weakest linear association.

Hope that helped!!! :)
5 0
3 years ago
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