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3 years ago

(Press this if you don't see it) I need help on number six and seven.

Mathematics

1 answer:

KIM [24]3 years ago

5 0

For number six, the sail is 3 ft tall.

Base x Height x (1/2) = a
2.5 x 3 x (1/2) = 3.75
7.2 x (1/2) = 3.75
3.5 = 3.5

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Solve for x: 1 < x + 3 < 4

MrRa [10]

It’s clearly number 2. 3 and 4 don’t have a 4 so it leaves 1 and 2 1 has gt so that’s wrong so it’s 2 because it has lt

4 0

2 years ago

In a small chess tournament, 20 matches were played. Find out how many people were involved if it is known that each participant

Nina [5.8K]

Answer:

5 players participated in the tournament.

Step-by-step explanation:

In a small chess tournament, 20 matches were played.

Let us assume that n number of players participated in the tournament

As in each game 2 players play, so the number of ways they can play is,

$=\ ^nC_2$

As they played 2 games with every other participant in the tournament.

So the total number of games is,

$=\ 2\times ^nC_2$

But it is given to be 20, so

$\Rightarrow \ 2\times ^nC_2=20$

$\Rightarrow \ ^nC_2=10$

$\Rightarrow \dfrac{n!}{2!(n-2)!}=10$

$\Rightarrow \dfrac{n(n-1)}{2}=10$

$\Rightarrow {n(n-1)=20$

As $5\times 4=20$ , so we get n=5.

Therefore, 5 players participated in the tournament.

5 0

2 years ago

Read 2 more answers

Please help me!!!!!!

enot [183]

Answer:

Step-by-step explanation:

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4 0

3 years ago

You will get brainlyest if you do this 16x^0+5x^2*y-1= plz help now

aev [14]

Answer:

=5x^2y+15

Step-by-step explanation:

16x^0+5x^2*y-1=

16x0+5x2y−1

Combine Like Terms:

16+5x2y+−1

=(5x2y)+(16+−1)

=5x^2y+15

Hope this helps!!! If you ever need more help just ask in the comments or somewhere.

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3 years ago

mrs chambers is 62 years old and plans to retire. over her life she earned an average of $2,500 per month after adjusting for in

antiseptic1488 [7]

Answer: 60

Step-by-step explanation:

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2 years ago