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2 years ago

I need help on this, if anyone knows how to do this can you help me out pls

Mathematics

1 answer:

ASHA 777 [7]2 years ago

6 0

<h3>Answer: (3, 0)</h3>

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Explanation:

Let's isolate x in the first equation.

x-2y = 3

x = 3+2y

Then we'll plug this into the second equation

Afterwards, solve for y.

2x + 4y = 6

2(3+2y)+4y = 6

6+4y+4y = 6

8y+6 = 6

8y = 6-6

8y = 0

y = 0/8

y = 0

Use this to find x.

x = 3+2y

x = 3+2(0)

x = 3

The solution is therefore (x,y) = (3, 0)

If you were to graph both lines, then they would intersect at the location (3,0).

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Checking the answer:

Plug x = 3 and y = 0 into the first equation.

x-2y = 3

3-2(0) = 3

3 - 0 = 3

3 = 3 that works

Repeat for the other equation

2x+4y = 6

2(3) + 4(0) = 6

6 + 0 = 6

6 = 6 that works as well

Both equations are true when (x,y) = (3,0).

The solution is confirmed.

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Rebecca is a real estate agent who would like to find evidence supporting the claim that the population mean market value of hou

nydimaria [60]

Answer:

Option C) There are enough evidence that at significance level of 0.05 to support the claim that the the population mean market value of houses in the neighborhood where she works is greater than $250,000.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = $250,000

Sample mean, $\bar{x}$ = $259,860

Sample size, n = 35

Alpha, α = 0.05

Sample standard deviation, σ = $24.922

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 250,000\text{ dollars}\\H_A: \mu > 250,000\text{ dollars}$

We use One-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} } = 2.34$

$0.01 < \text{ p-value }< 0.025$

Since the p-value is less than the significance level, we fail to accept the null hypothesis.

There are enough evidence that at significance level of 0.05 to support the claim that the the population mean market value of houses in the neighborhood where she works is greater than $250,000.

6 0

2 years ago

I need help ASAP!!!!!!!!!!!!

Marianna [84]

Answer:

I hope this helps!