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kap26 [50]
3 years ago
9

This is really easy! pic below..

Mathematics
1 answer:
KATRIN_1 [288]3 years ago
5 0
The answer is A.
I think so because each one of them agrees with 20x and 15
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In one round robin chess tournament, 36 games were played. How many players entered in the tournament?
ICE Princess25 [194]
\displaystyle
\binom{n}{2}=36\\\\
\dfrac{n!}{2!(n-2)!}=36\\
\dfrac{n(n-1)}{2}=36\\
n(n-1)=72\\
n^2-n-72=0\\
n^2-9n+8n-72=0\\
n(n-9)+8(n-9)=0\\
(n+8)(n-9)=0\\
n=-8 \vee n=9

The number of players can't be negative, so there was 9 players.


6 0
4 years ago
Lonna uses 8.2 pints of blue paint and white paint to paint her bedroom walls. 2 5 of this amount is blue paint, and the rest is
vova2212 [387]

Answer:

the number of pints of blue paint did she use for painting her bedroom walls is 1.875 pints

Step-by-step explanation:

The computation of the number of pints of blue paint did she use for painting her bedroom walls is shown below:

= Total pint × blue paint

= 7.5 × (1 - 3 ÷ 4)

= 7.5 ×  1 ÷ 4

= 1.875 pints

Hence, the number of pints of blue paint did she use for painting her bedroom walls is 1.875 pints

5 0
3 years ago
Which is the net for the figure shown?
Nataliya [291]

Answer:

The third one, with the sideways "z" shape.

Step-by-step explanation:

When folded, this net shape will become the new figure.

3 0
3 years ago
Meijer sells 10 bottles of soap for $15 and 20 bottles of soap for
podryga [215]

Answer:

20 bottles for 28

Step-by-step explanation:

15 ÷  10 = 1.5

28 ÷ 20 = 1.4

3 0
3 years ago
Write an equation of the parabola in vertex form that passes through (0, −24) and has vertex (−6, −12)
Elenna [48]
The general equation is y-k=a(x-h)² where (h,k) is the vertex.

So in this case we have y+12=a(x+6)².

Plug in x=0, y=-24: -12=36a, and a=-⅓. Therefore y+12=-⅓(x+6)².
4 0
3 years ago
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