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kramer
3 years ago
11

Stanley practices his running, swimming and biking every day. During these practices he runs at 9 mph, bikes at 16 mph and swims

at 2.5 mph. Yesterday he ran for half an hour longer than he swam, and his biking time was twice his running time. How long did Stanley run, swim, and bike yesterday if the total distance he covered was 64 miles?
What was the total distance Stanley covered during practices in terms of t?
Mathematics
2 answers:
Amiraneli [1.4K]3 years ago
6 0

Answer:43

Step-by-step explanation:

Butoxors [25]3 years ago
3 0

Answer:

43.5t+20.5 is your complete answer

Step-by-step explanation:

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Answer:

Test scores of 10.2 or lower are significantly low.

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Step-by-step explanation:

Z-score:

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

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The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 20.6, \sigma = 5.2

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So scores of X when Z = -2 or lower

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X = 10.2

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X - 20.6 = 2*5.2

X = 31

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