Someone please help me

Mathematics

2 answers:

mixas84 [53]4 years ago

8 0

Your answer would be y=1-2x because if you plug each coordinate in for the appropriate variables, all are correct. Therefore, you do not need to go any farther than the first option. Although, I recommend checking the others just to be safe.

Basically, all you are doing is plugging in numbers, and then solving :)

Hope this helps!! :)

UkoKoshka [18]4 years ago

6 0

It's the first answer
hope this helps

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Results of a survey conducted in 15 large cities within the U.S. finds that the average commute time one way to/from work is 25.

irina1246 [14]

Answer:

We conclude that commute time in her city is less than the amount reported by the survey which is 25.4 minutes.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 25.4 minutes

Sample mean, $\bar{x}$ = 22.1 minutes

Sample size, n = 15

Alpha, α = 0.10

Sample standard deviation, s = 5.3 minutes

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 25.4\text{ minutes}\\H_A: \mu < 25.4\text{ minutes}$

We use one-tailed t(left) test to perform this hypothesis.

Formula:

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

Putting all the values, we have

$t_{stat} = \displaystyle\frac{22.1 - 25.4}{\frac{5.3}{\sqrt{15}} } = -2.411$

Now, $t_{critical} \text{ at 0.10 level of significance, 14 degree of freedom } = -1.345$

Since,

$t_{stat} < t_{critical}$

We fail to accept the null hypothesis and reject it. We accept the alternate hypothesis.

Thus, there is enough evidence to conclude that commute time in her city is less than the amount reported by the survey which is 25.4 minutes.

7 0

4 years ago

What is -9.6 repeating written as a fraction

kaheart [24]

$-9.6=-9\frac{6}{10}=-9\frac{6:2}{10:2}=-9\frac{3}{5}=-\frac{9\cdot5+3}{5}=-\frac{45+3}{5}=\boxed{-\frac{48}{5}}\\\\or\ other\ method\\\\-9.6=-\frac{96}{10}=-\frac{96:2}{10:2}=\boxed{-\frac{48}{5}}$