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IRISSAK [1]
2 years ago
11

The equations x + 5 y = 10, 3 x minus y = 1, x minus 5 y = 10, and 3 x + y = 1 are shown on the graph below. On a coordinate pla

ne, there are 4 lines. Green line goes through (0, negative 1) and (1, 2). Blue line goes through (0, 1) and (1, negative 2). Pink line goes through (0, 2), and (2, 1.5). Orange line goes through (negative 2, negative 2.5) and (2, negative 1.5).

Mathematics
1 answer:
natita [175]2 years ago
7 0

Answer:

The question is missing, so I will answer all the solution for each possible system of two equations.

Step-by-step explanation:

The equations

x + 5 y = 10 (red)

3 x - y = 1 (blue)

x - 5 y = 10 (green)

3 x + y = 1 (purple)

are shown in the picture atatched. The intersection between two lines is the solution of their system.

<u>system:</u>

x + 5 y = 10 (red)

3 x - y = 1 (blue)

<u>solution</u>: (0.938, 1.813)

<u>system</u>:

x + 5 y = 10 (red)

x - 5 y = 10 (green)

<u>solution</u>: (10, 0)

<u>system</u>:

x + 5 y = 10 (red)

3 x + y = 1 (purple)

<u>solution</u>: (-0.357, 2.071)

<u>system</u>:

3 x - y = 1 (blue)

x - 5 y = 10 (green)

<u>solution</u>: (-0.357, -2.071)

<u>system</u>:

3 x - y = 1 (blue)

3 x + y = 1 (purple)

<u>solution</u>: (0.333, 0)

<u>system</u>:

x - 5 y = 10 (green)

3 x + y = 1 (purple)

<u>solution</u>: (0.938, -1.813)

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Step-by-step explanation:

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compute the exact value of the function for the given x-value wothout using a calculaotor . f(x)=(1/3)^x for x=-1
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f(x) = (1/3)^x

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Hope this helps!

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3 years ago
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Montano1993 [528]

The answer is A because 13 times 6 equals 78

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3 years ago
Why is -a² is always negative (a ≠ 0) and why is (-a)² is always positive?
hjlf
-a^2=(-1)\cdot a\cdot a

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On the other hand,

(-a)^2=((-1)\cdot a)^2=(-1)^2\cdot a^2=1\cdot a^2=a^2

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6 0
2 years ago
Hannah claims that people who live in southern states spend 9 hours more per week outside than do people in northern states. She
vova2212 [387]

Answer:

b. Hannah is likely to be incorrect because 9 is not contained in the interval.

Step-by-step explanation:

Hello!

Hannah estimated per CI the difference between the average time that people spend outside in southern states and the average time people spend outside in northern states.

The CI is a method of estimation of population parameters that propose a range of possible values for them. The confidence level you use to construct the interval can be interpreted as, if you were to calculate 100 confidence interval, you'd expect that 99 of them will contain the true value of the parameter of interest.

In this example, the 99%CI resulted [0.4;8.0]hs

Meaning that with a 99% confidence level you'd expect the value of the difference between the average time people from southern states spend outside than the average time people from northern states spend outside is included in the interval [0.4;8.0]hs.

Now, she claims that people living in southern states spend 9 more hours outside than people living in northern states, symbolized μ₁ - μ₂ > 9

Keep in mind that if you were to test her claim, the resulting hypothesis test would be one-tailed

H₀: μ₁ - μ₂ ≤ 9

H₁: μ₁ - μ₂ > 9

And that the calculated Ci is tow-tailed, so it is not valid to use it to decide over the hypotheses pair. This said, considering that the calculated interval doesn't contain 9, it is most likely that Hannah's claim is incorrect.

I hope this helps!

6 0
2 years ago
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