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abruzzese [7]
3 years ago
5

connie worked three more than twice as many hours as gary did. how many hours did each work of together they worked 48 hrs?

Mathematics
1 answer:
dimaraw [331]3 years ago
6 0

Answer:

33

Step-by-step explanation:

if she worked three more than twice as many hours as gary worked we can subtract 3 for 48 which leaves 45. she worked twice as many hours as he did and 45 is perfectly devisable by 3 at 15 so she worked 30 hours plus 3 while gary only worked 15 hours. This could be wrong but i dont think it is :)

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3 years ago
A physical fitness association is including the mile run in its secondary- school fitness test. the time for this event for boys
liberstina [14]

Answer:

<u>The probability that a randomly selected boy in school can run the mile in less than 348 seconds is 1.1%.</u>

Step-by-step explanation:

1. Let's review the information provided to us to answer the question correctly:

μ of the time a group of boys run the mile in its secondary- school fitness test  = 440 seconds

σ of the time a group of boys run the mile in its secondary- school fitness test = 40 seconds

2. Find the probability that a randomly selected boy in school can run the mile in less than 348 seconds.

Let's find out the z-score, this way:

z-score = (348 - 440)/40

z-score = -92/40 = -2.3

Now let's find out the probability of z-score = -2.3, using the table:

p (-2.3) = 0.0107

p (-2.3) = 0.0107 * 100

p (-2.3) = 1.1% (rounding to the next tenth)

<u>The probability that a randomly selected boy in school can run the mile in less than 348 seconds is 1.1%.</u>

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3 years ago
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