3 years ago

Solve (−8x−12)+(9x+4)=

1 answer:

6 0

(-8x-12) + (9x+4)
= -8x+9x-12+4
= X - 8

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If m = 27 and n = 4, what is the value of the following expression?

wel

Answer:

Step-by-step explanation:

m - 5 • n + 5

plug it in

27- 5 * 4+5

well, we gotta follow PEMDAS (there are no parentheses)

5*4

now we have

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3 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

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

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$=\ 2\times ^nC_2$

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

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

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

Therefore, 5 players participated in the tournament.

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3 years ago

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The two lines graphed below are parallel. How many solutions are there to the system of equations?

coldgirl [10]

Solutions just means the amount of times the lines intersect, so there are no solutions. Since the lines are parallel, they’re going the exact same direction forever and ever, never intersecting. Hope this helps!

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3 years ago

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kifflom [539]

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Step-by-step explanation:

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What is 80% as a fraction?

IgorLugansk [536]

80% = 80/100 = 8/10 = 4/5