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Veseljchak [2.6K]
3 years ago
8

Find the sum and choose the correct answer. 2n 3 + 4n 2 - 7 and -n 3 - 8n - 2

Mathematics
1 answer:
julsineya [31]3 years ago
7 0

Answer:

n³ + 4n² - 8n - 9

Step-by-step explanation:

(2n³ + 4n² - 7) + (-n³ - 8n - 2)

2n³ + 4n² - 7 - n³ - 8n - 2

2n³ - n³ + 4n²- 8n - 7 - 2

n³ + 4n² - 8n - 9

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Given the points A and BThe coordinates of point A = ( 3 , 1 )The coordinates of point B = (-1 , -1)The midpoint of AB = ([?],[
mr Goodwill [35]

Given the points A and B

The coordinates of point A = ( 3 , 1 )

The coordinates of point B = (-1 , -1)

The midpoint of AB, is the point C

C will be calculated as following :

C=\frac{A+B}{2}=\frac{(3,1)+(-1,-1)}{2}=\frac{(3-1,1-1)}{2}=\frac{(2,0)}{2}=(1,0)

so, the midpoint of AB = (1 , 0 )

3 0
1 year ago
What isn't equivalent to 1/3
Nostrana [21]
If you mean just any fraction in the world that isn't equivalent to 1/3, then 5/6   7/9   and 2/10 would work

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6 0
4 years ago
In a class of 40 students, 5 like neither Nokia nor
STatiana [176]

Answer:

<em><u>The number of students that like only Nokia </u></em>

<h2>= 30</h2>

Step-by-step explanation:

consider N the number of students who like Nokia → N=?

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Statement 1: In a class of 40 students, 5 like neither Nokia nor Techno

we can translate it like this: 35 student like Nokia or Techno

we can note it like this : T∪N= 35

Statement 2: 30 like Techno and Nokia

we can note it : T∩N = 30

using a rule concerning the number of element of a set :

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then

35 = N + 35 - 30

⇒ N - 30 = 0

⇒ N = 30

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Step-by-step explanation:

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