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kvasek [131]
3 years ago
8

In an experiment with a social interaction 3 people will sit in 3 rows, how many ways can this be done

Mathematics
1 answer:
Lana71 [14]3 years ago
8 0

Answer:

6 ways

Step-by-step explanation:

Given: 3 people to be seated in 3 rows.

This problem is simple permutation problem in which 3 people are be seated on 3 seat available seats

Therefore possible arrangement = 3×2×1 =6 ways

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Please help me with a geometry problem, I don't understand.
Goshia [24]

The slope-intercept form:

y=mx+b\\\\m=\dfrac{y_2-y_1}{x_2-x_1}

m - slope

b - y-intercept

We have the points (1, -5) and (9, 11). Substitute:

m=\dfrac{11-(-5)}{9-1}=\dfrac{16}{8}=2

Therefore we have

y=2x+b

Put the coordinates of the point (1, -5) to the equation:

-5=2(1)+b\\\\-5=2+b\qquad\text{subtract 2 from both sides}\\\\-7=b\to b=-7

<h3>Answer: y = 2x - 7</h3>
6 0
3 years ago
The speed of the current in a river is 6 mph. A ferry operator who works that part of the river is looking to
Morgarella [4.7K]

Answer:

  • 9 mph

Step-by-step explanation:

Let he speed of the boat on the lake is x.

<u>Considering the speed of the current it will take him:</u>

  • 22.5/(x + 6) + 22.5/(x - 6) = 9
  • 2.5 / (x  + 6) + 2.5 / (x - 6) = 1
  • 2.5(x - 6 + x + 6) = (x + 6)(x - 6)
  • 2.5*2x = x² - 36
  • x² - 5x - 36 = 0
  • x = (5 ± √(5² + 4*36))/2 = (5 ± 13) / 2
  • x = (5 + 13)/2 = 9 mph (negative root is discarded as the speed should be positive)
7 0
3 years ago
PLLLLSSSSSSS HELP ME !!!!!!!???????
LenaWriter [7]

Answer:

Step-by-step explanation:

because -3 is a zero, so x=-3

(k-1)(-3)²+k(-3)+1=0

9(k-1)-3k+1=0

9k-9-3k+1=0

6k=8

3k=4

k=4/3

(B)

∵ x=-1 is a zero of p(x)=kx²-4x+k

so k(-1)²-4(-1)+(-1)=0

k+4-1=0

k=-3

7 0
3 years ago
A train travel 720km in 9h. How far it travels in 11hr?​
Alex Ar [27]

Answer:

880km

Step-by-step explanation:

first 720 by 9 =80

second 80 x 11 = 880

then add the km

last you have 880km

8 0
3 years ago
Read 2 more answers
In which quadrant does the point (–10, 9) lie?
Furkat [3]


A. Quadrant I is the correct answer.

x axis is  -10   and y axis is 9

5 0
3 years ago
Read 2 more answers
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