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3 years ago

Solve the equation 1/2y+3/4=8

Mathematics

1 answer:

andreev551 [17]3 years ago

3 0

Answer:

14.5

Step-by-step explanation:

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Determine the unit rate of a marathon runner who travels 9/2 miles in 3/4 hour.

ludmilkaskok [199]

Answer:

The marathon runner runs 1 mile every 10 minutes.

Step-by-step explanation:

9/2 miles is equal to 4.5 miles. 3/4 hours is equal to 45 minutes.

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3 years ago

What's the slope and y-intercept?

Shtirlitz [24]

Answer:

Slope: 2; Y-Intercept: (0,3)

Step-by-step explanation:

As you can see from the graph, it rises 4 and runs 2. So, the slope is 2. It intersects the y axis at (0,3)

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2 years ago

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Instructions: Type the correct answer in each box. If necessary, use / for the fraction bar.

Alinara [238K]

The slope of diagonal <em>AB</em> is 0 and its equation is y=2.

7 0

3 years ago

Can somebody help me please?

Gnesinka [82]

Answer:

$22.50

Step-by-step explanation:

C= 0.20X+14.50

C=0.20(40)+14.50

C=8+14.50

C=22.50

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3 years ago

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The weights of 67 randomly selected axles were found to have a variance of 3.85. Construct the 80% confidence interval for the p

VLD [36.1K]

Answer:

$3.13$

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 67

Variance = 3.85

We have to find 80% confidence interval for the population variance of the weights.

Degree of freedom = 67 - 1 = 66

Level of significance = 0.2

Chi square critical value for lower tail =

$\chi^2_{1-\frac{\alpha}{2}}= 51.770$

Chi square critical value for upper tail =

$\chi^2_{\frac{\alpha}{2}}= 81.085$

80% confidence interval:

$\dfrac{(n-1)S^2}{\chi^2_{\frac{\alpha}{2}}} < \sigma^2 < \dfrac{(n-1)S^2}{\chi^2_{1-\frac{\alpha}{2}}}$

Putting values, we get,

$=\dfrac{(67-1)3.85}{81.085} < \sigma^2 < \dfrac{(67-1)3.85}{51.770}\\\\=3.13$

Thus, (3.13,4.91) is the required 80% confidence interval for the population variance of the weights.

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3 years ago