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anygoal [31]
3 years ago
15

Bill wants to save up to buy a new watch which costs $235. If he already has $75 and he saves $8 each week, how many weeks will

it take him to have enough money to purchase the watch? How many days will it take?
Mathematics
2 answers:
Tpy6a [65]3 years ago
7 0
To save up enough you will have to take 235-75 which will equal 160 then you take the weekly pay and divide that, it will take 20 weeks.
MAVERICK [17]3 years ago
4 0
This can be solved by the equation $235= 8x + 75. To begin subtract 75 from both sides to get 160=8x. With this new equation, divide both sides by 8 to get 20=x or x=20. Since x represents the number of weeks Bill is required to work for the bike, 20 is correct amount of weeks.
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Step-by-step explanation:

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Zarrin [17]

Answer:

a) The difference is of 35 beats per minute.

b) So 3.07 standard deviations below the mean.

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Step-by-step explanation:

Z-score:

In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

In this question:

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