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Ksenya-84 [330]
3 years ago
7

The equation 9(u – 2) + 1.5u = 8.25 models the total miles Michael traveled one afternoon while sledding, where u equals the num

ber of hours walking up a hill and (u – 2) equals the number of hours sledding down the hill. Which is the value of u?
A. u = 0.25
B. u = 0.75
C.u = 1.1
D. u = 2.5
Mathematics
2 answers:
earnstyle [38]3 years ago
8 0

The <u>equation </u>9(u-2) + 1.5u = 8.25 <u>models</u> the total miles Michael traveled one afternoon while sledding. u equals to <u>number of hours</u> walking up a hill and (u – 2) equals to number of hours sledding down the hill.

Solve this equation:

9(u-2) + 1.5u = 8.25,\\ \\9u-18+1.5u=8.25,\\ \\9u+1.5u=8.25+18,\\ \\10.5u=26.25,\\ \\u=2.5\ hours

Answer: correct choice is D

Greeley [361]3 years ago
4 0

D is the correct answer

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3/4 of an hour is equivalent to 45 minutes

then we have to add 5 hours and 45 minutes to 11.32 pm

add 5.45 to 11.32


11.32

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16.77

then its 16 hours and 77 minutes

an hour has only 60 minutes so we subtract 60 minutes from 77 minutes and add that hour to 16 hours

16 hours + 1 = 17 hours 

77 minutes - 60 minutes = 17 minutes

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time is given in pm therefore its a 12 hour clock

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the new time is 5.17 am of the next day



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Answer:

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To find the weighed average, we add the values multiplied by their weight, and after that we divide by the sum of weights.

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