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cestrela7 [59]
4 years ago
5

Solve the system using elimination. 3x + 3y = –9 3x – 3y = 21

Mathematics
1 answer:
Nikolay [14]4 years ago
8 0
<span>x + 3y = –9
3x – 3y = 21
-------------------add
4x = 12
  x = 3

substitute x = 3 into </span>x + 3y = –9 
3 + 3y = –9 
3y = -12
  y = -4

Answer
(3, -4) is the solution of the system.
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Have Retirement Benefits
charle [14.2K]

Answer:

(a) The probability of the intersection of events "man" and "yes" is 0.55.

(b) The probability of the intersection of events "no" and "man" is 0.10.

(c) The probability of the union of events "woman" or "no" is 0.45.

Step-by-step explanation:

The information provided is:

             Yes    No   Total

Men       275   50     325

Women  150   25      175

Total      425   75      500

(a)

Compute the probability that a randomly selected employee is a man and a has retirement benefits as follows:

P(M\cap Y)=\frac{n(M\cap Y)}{N}=\frac{275}{500}=0.55

Thus, the probability of the intersection of events "man" and "yes" is 0.55.

(b)

Compute the probability that a randomly selected employee does not have retirement benefits and is a man as follows:

P(N\cap M)=\frac{n(N\cap M)}{N}=\frac{50}{500}=0.10

Thus, the probability of the intersection of events "no" and "man" is 0.10.

(c)

Compute the probability that a randomly selected employee is a woman or has no retirement benefits as follows:

P(W\cup N)=P(W)+P(N)-P(W\cap N)=\frac{175}{500}+\frac{75}{500}-\frac{25}{500}=0.45

Thus, the probability of the union of events "woman" or "no" is 0.45.

5 0
3 years ago
What is m/3 = -12 I really need help with problem please help
Helga [31]

Answer:

m=-36

Step-by-step explanation:

(3)m/3=-12(3) multiply by three to cancel out

m=-36

hope this helps :)

8 0
3 years ago
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IgorC [24]

Answer:

B. 14 = 125p

Step-by-step explanation:

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Long division (3a²-8a? +19a – 7) + (3a-2)
myrzilka [38]

Answer:

3a^2+12a-7

Step-by-step explanation:

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3 years ago
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Alex Ar [27]

She needs at least 130 points, so 130 - 75 (that she is earning from the sign up) = 65 points.

65 : 5,5 = 11,81 ≈ 12

So she has to sign up and visit he movie theatre at least 12 times to earn a movie ticket.

4 0
3 years ago
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