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3 years ago

Solve for x: 2x + y = -2 4x + y = -8

Mathematics

2 answers:

bagirrra123 [75]3 years ago

7 0

Answer:

x = -3

Step-by-step explanation:

2x + y = -2

4x + y = -8

2x + y = - 2

y = -2x - 2

4x + y = - 8

y = -4x - 8

y = -2x - 2

y = -4x - 8

-2x - 2 = -4x - 8

4x - 2x = 2 - 8

2x = -6

2x/2 = -6/2

x = -3

To check just use da graph ;w;

The x is -3

MArishka [77]3 years ago

4 0

Answer:

Step-by-step explanation:

x= −1 −y/2

x= 4 −8−y/4

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The confidence interval for a difference in population proportion is calculated following these steps:

First, let's find population proportion for each population:

$p_{1}=\frac{30}{120}=0.25$

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Second, calculate standard deviation for each proportion:

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Read 2 more answers

A martial artist is practicing breaking 5 boards. He is able to break a board with probability 0.8. (a) What is the probability

konstantin123 [22]

Answer:

(a) = 0.32 or 8/25

(b) = 0.48 or 12/25

Step-by-step explanation:

(a):

0.8 x 2/5

8/10 x 4/10

(8 x 4) / (10 x 10)

(32) / (100)

0.32 or 8/25

(b):

0.8 x 3/5

8/10 x 6/10

(8 x 6) / (10 x 10)

(48) / (100)

0.48 or 12/25

(c):

0.8 x 5

8/10 x 50/10

(8 x 50) / (10 x 10)

(400) / (100)

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