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tino4ka555 [31]
3 years ago
10

Stephanie Lopez loves raisins and cherries. Raisins cost $5 per pound. Cherries cost $9 per pound. She has $90 to spend.

Mathematics
2 answers:
OverLord2011 [107]3 years ago
5 0

Answer:

5x + 9y = 90

Whatever the amount of raisins you buy times 5, plus the amount of cherries times 9 equals $90.

Verizon [17]3 years ago
4 0
Multiply the amount of raisins u bought by 5, then add however many cherries, multiplied by 9 and the answer is 90
5x + 9y = 90


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Answer:

Probability that the average time spent studying for the sample was between 29 and 30 hours studying is 0.0321.

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We are given that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 15.

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<em>Let </em>\bar X<em> = sample average time spent studying</em>

The z-score probability distribution for sample mean is given by;

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Therefore, P(29 hours < \bar X < 30 hours) = 0.97725 - 0.94520 = 0.0321

Hence, the probability that the average time spent studying for the sample was between 29 and 30 hours studying is 0.0321.

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