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marshall27 [118]
3 years ago
11

You drive 150 miles in 3 hours before stopping for 30 minutes to have lunch and gas.  After lunch you travel 100 miles in an hou

r and a half.  What was your average speed?
Mathematics
1 answer:
KiRa [710]3 years ago
7 0
Average speed = total miles driven / total driving time
average speed = (150 + 100) / (3 + 1 1/2) =
                             250 / (4 1/2) =
                             250 / (9/2) =
                             250 * 2/9 =
                             500 / 9 = 55.55 mph
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Answer:

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Step-by-step explanation:

We have the follwoing dataset:

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The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

And in order to calculate the correlation coefficient we can use this formula:

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}  

For our case we have this:

n=10 \sum x = 269, \sum y = 383, \sum xy = 10609, \sum x^2 =8645, \sum y^2 =15007  

Th excel figure attached shows the calculations for each sum.

r=\frac{10(10609)-(269)(383)}{\sqrt{[10(8645) -(269)^2][10(15007) -(383)^2]}}=0.4437  

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3 0
3 years ago
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Afina-wow [57]

Answer:

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Step-by-step explanation:

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Now numbers that when they are divided by 9, the remainder is 8.
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Double check your work.
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