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Lubov Fominskaja [6]
3 years ago
10

What are the coordinates of the point on the directed line segment from (-1, -2)(−1,−2) to (9, -10)(9,−10) that partitions the s

egment into a ratio of 3 to 1?
Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
7 0

Answer:

Correct answer:  C (6.5 , - 8)

Step-by-step explanation:

Given points A(-1,-2) and B(9, -10)

The formula by which we calculate the coordinates of a point, let be C, that divides the line segment in the given ratio is.

Xc = (Xa + λ · Xb) / (1 + λ)  and  Yc = (Ya + λ · Yb) / (1 + λ)

Where λ is the coefficient which depends on the direction of the ratio in this case is:

λ = 3 : 1 = 3

Xc = (-1 + 3 · 9) / (1 + 3) = (-1 + 27)/ 4 = 26 / 4 = 6.5

Xc = 6.5

Yc = (-2 + 3 · (-10) / (1 + 3) = (-2 - 30)/ 4 = -32 / 4 = - 8

Yc = - 8

God is with you!!!

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Solve this system of equations
olga_2 [115]

Answer:

D) x = 4, y = -2, z = 3

Step-by-step explanation:

x = 3z − 5

2x + 2z = y + 16

2(3z - 5) + 2z = y + 16

6z - 10 + 2z = y + 16

8z = y + 26 ---> (A)

7x − 5z = 3y + 19

7(3z - 5) - 5z = 3y + 19

21z - 35 - 5z = 3y + 19

16z = 3y + 54 ---> (B)

8z = y + 26

16z = 3y + 54

2(y + 26) = 3y + 54

2y + 52 = 3y + 54

y = -2

8z = -2 + 26

8z = 24

z = 3

x = 3(3) - 5

x = 4

8 0
3 years ago
The average number of Saturday night shootings is 5 a night. What’s the chance that there will be a need for exactly 3 shootings
pishuonlain [190]

Answer:

0.14

Step-by-step explanation:

Using the poisson probability relation :

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From the question ; mean, λ = 5 ; x = 3

Hence,

P(x = 3) = (5^3 * e^-5) ÷ 3!

P(x = 3) = (125 * 0.0067379) / 6

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Answer:

The answers from left side on

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Step-by-step explanation:

Good luck ^_^

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