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Mice21 [21]
3 years ago
14

Solve the following system using the addition method:

Mathematics
2 answers:
Natasha2012 [34]3 years ago
7 0

<u>Answer:</u>

(x, y) = (1, 1)

<u>Step-by-step explanation:</u>

-27x + 6y = -21 --- (1)

-12x +3y = -9 --- (2)

Multiplying (2) by -2 to get:

24 x - 6 y = 1 8 --- (3)

Adding (1) and (3) to get:

-27x + 6y = -21

24x-6y=18

------------------------------------

-3x=-3

x = 1

Finding y:

-12(1) +3y = -9

3y=-9+12

3y=3

y = 1

Therefore, (x, y) = (1, 1).

jasenka [17]3 years ago
5 0

(X,Y)= (1,1)

Explanation:

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DaniilM [7]

The test statistic z will be equal to -0.946 and it shows that there is no significant difference in the proportion of rehires between full time and part time.

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Proportion  of full time=434/833=0.52

Proportion of part time=189/386=0.49.

Difference in proportion =0.52-0.49

H_{0}:TTF- i∈ rho=0

H_{1}: TTF+i∈ rho≠0.

Mean of difference=0.03

Z=(X-μ)/σ

σ=\sqrt{0.4517/447}

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p value will be =0.1736.

Because p value is greater than 0.01 so we will accept the null hypothesis which shows that there is no significant difference in the proportions.

Hence there is no significant difference in the proportion of rehires between full time and part time.

Learn more about z test at brainly.com/question/14453510

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6 0
2 years ago
PLS Help Asap! i will award brainliest On her way to her grandmother's house, Jackie traveled three times as many miles by train
nirvana33 [79]

Answer:

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Jackie traveled four times as many miles by bus as by foot. This means that the number of miles travelled by bus is 4 units, and the number of miles travelled by foot is 1 unit.

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3 years ago
The gross weight of a package and its contents is 11 pounds 5 ounces. If the packaging weighs 1 pound 15 ounces, what's the net
dsp73
Answer A
For ease convert both into ounces.

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