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Mumz [18]
3 years ago
10

Which of the equations below represents a line parallel to the y-axis?

Mathematics
1 answer:
Nadya [2.5K]3 years ago
3 0

Answer:

A. x=4

Step-by-step explanation:

The y-axis is a vertical line at x=0, so for a line to be parallel to x=0, x must equal another constant. Option A is the only option that has a constant.

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Find the range of the data. <br><br> 98, 21, 52, 39, 45 76
Alenkinab [10]

Answer:

77

Step-by-step explanation:

The range of the data is largest number minus smallest number.

98-21

77

8 0
3 years ago
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Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains
fenix001 [56]
So 5 liters of natural for every 7 synthetic, so 5 / 12 liters are natural oil.

so; 684 × (5/12) = 285 liters of natural oil

Hope this helps!
7 0
3 years ago
What is the value of the correlation coefficient r of the data set?
vova2212 [387]

The correlation coefficient r of the data set is <em>-0.28</em>

7 0
3 years ago
A right triangle has sides of length 3, 4, and .
olchik [2.2K]

Answer:

5/hypotenuse, the square root of 7/ leg

Step-by-step explanation:

3^2+4^2=25 or 5^2. you use a^2+b^2=c^2. it would be one of the hypotenuses. If the missing number is a leg, you would do 4^2=3^2+x^2. 16=9+x^2, 7=x^2, so you plug in the numbers differently.

3 0
3 years ago
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A teacher was interested in finding out whether a special study program would increase the scores of students on a national exam
bija089 [108]

Answer:

Check the explanation

Step-by-step explanation:

Going by the first attached image below we reject H_o against  H_1 if obs.T > t_{\alpha /2;n-1}

here obs.T=1.879

\therefore obs.T \ngtr 2.447=t_{0.025;6}

we accept H_o:\mu _{1}=\mu_{2} at 5% level of significance.

i.e there is no sufficient evidence to indicate that the special study program is more effective at 5% level of significance.

1.

this problem is simillar to the previous one except the alternative hypothesis.

Let X_i's denote the bonuses given by female managers and Y_i's denote the bonuses given by male managers.

we assume that X_i \sim N(\mu _{1},\sigma _{1}^{2}) Y_i \sim N(\mu _{2},\sigma _{2}^{2}) independently

We want to test H_0:\mu_{1}=\mu_{2} vs H_1:\mu_{1}\neq \mu_{2}

define D_i=X_i-Y_i , i=1(1)8

now D_i\sim N(\mu _{1}-\mu _{2}=\mu _{D},\sigma _{1}^{2}+\sigma _{2}^{2}=\sigma _{D}^{2}) , i=1(1)8

the hypothesis becomes

H_0:\mu_{D}=0 vs H_1:\mu_{D}\neq 0

in the third attached image, we use the same test statistic as before

i.e at 5% level of significance there is not enough evidence to indicate a difference in average bonuses .

3 0
3 years ago
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