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mixas84 [53]
3 years ago
13

Kenny wants to take his dog to an obedience school. At sit and stay school, 12 lessons cost $96. At canine community center,25 l

essons cost $125. Which is the better deal? Find the unit rate for lessons at sit and stay school.Show your work
Mathematics
1 answer:
Bad White [126]3 years ago
7 0

Answer:

the canine community center is the better deal

Step-by-step explanation:

the sit and stay school:

96/12 is 8

it is $8 per class

the canine community school:

125/5=5

it is $5 per class

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An artist can paint 4 paintings in 2 hours. What is the artist’s unit rate?
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Answer: if we divide the numerator and denominator by two, we get that he can paint two paintings in one hour. His unit rate is 2:1.

4:2 divide by two to make the denominator 1

2:1 solution has 1 in the denominator

Step-by-step explanation:

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Help please, thank you
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A copy of a line segment will have the same measure or length as the segment.

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Hence, both lines are congruent, and the true statement is (d)

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A researcher records the repair cost for 8 randomly selected washers. A sample mean of $60.46 and standard deviation of $18.36 a
Anuta_ua [19.1K]

Answer:

The critical value is T = 1.895.

The 90% confidence interval for the mean repair cost for the washers is between $48.159 and $72.761

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 8 - 1 = 6

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 6 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 1.895, which is the critical value.

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.895\frac{18.36}{\sqrt{8}} = 12.301

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The lower end of the interval is the sample mean subtracted by M. So it is 60.46 - 12.301 = $48.159

The upper end of the interval is the sample mean added to M. So it is 60.46 + 12.301 = $72.761

The 90% confidence interval for the mean repair cost for the washers is between $48.159 and $72.761

8 0
3 years ago
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