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Ilia_Sergeevich [38]
2 years ago
8

If 12 +22+ 32 +

Mathematics
1 answer:
kakasveta [241]2 years ago
8 0

Answer:

m2

Step-by-step explanation:

the 2nd equation is double the first one and the first one is 1

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There are 112 seats in the school auditorium. There are 7 seats in each row. There are 70 people seated,filling up full rows of
lord [1]
I think 11 rows are empty.
6 0
3 years ago
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A jar of marbles has five blue marbles, three red marbles, and four green marbles. What is the possibility of drawing a marble t
solniwko [45]

Answer:

5/36

Step-by-step explanation:

The chance of drawing a blue marble is 5/12. The chance of drawing a green marble is 4/12. You multiply the fractions to get the probability.

5/12 * 4/12 =20/144 = 5/36 simplified.

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3 years ago
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In a doctor's waiting room, there are 14 seats in a row. Eight people are waiting to be seated. Three of the 8 are in one family
lianna [129]
There are 14 chairs and  8 people to be seated. But among the 8. three will be seated together:

So 5 people and (3) could be considered as 6 entities:

Since the order matters, we have to use permutation:

¹⁴P₆ = (14!)/(14-6)! = 2,162,160, But the family composed of 3 people can permute among them in 3! ways or 6 ways. So the total number of permutation will be ¹⁴P₆  x 3! 

2,162,160 x 6 = 12,972,960 ways.

Another way to solve this problem is as follow:

5 + (3) people are considered (for the time being) as 6 entities:

The 1st has a choice among 14 ways
The 2nd has a choice among 13 ways
The 3rd has a choice among 12 ways
The 4th has a choice among 11 ways
The 5th has a choice among 10 ways
The 6th has a choice among 9ways

So far there are 14x13x12x11x10x9 = 2,162,160 ways
But the 3 (that formed one group) could seat among themselves in 3!
or 6 ways:

Total number of permutation = 2,162,160 x 6 = 12,972,960

4 0
3 years ago
What is the solution to the system of equations 3x + 2y = -10 and y = -x - 4
Mrrafil [7]

Answer:

(-2,-2)

Step-by-step explanation:

6 0
3 years ago
Reduce the ratio 8/12 to the lowest terms
Tanya [424]
The answer is 2/3
I hope this works for you :)
5 0
3 years ago
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