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Hunter-Best [27]
2 years ago
11

Which expression is three less than the product of a number and two,increased by five

Mathematics
1 answer:
Tpy6a [65]2 years ago
6 0

Answer:

(2x+5)-3

Step-by-step explanation:

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Professor York randomly surveyed 240 students at Oxnard University and found that 150 of the students surveyed watch more than 1
BaLLatris [955]

Answer:

1727 students

Step-by-step explanation:

Here we have the formula for sample size given as

n = \frac{p(1-p)z^2}{ME^2}

Where:

p = Mean

ME = Margin of error = 3

z = z score

Therefore, we have

p = 150/240 = 0.625

z  at 99 % = 2.575

ME = \pm3%

Therefore n = \frac{0.625(1-0.625)2.575^2}{0.03^2} = 1726.73

The number of students Professor York have to sample to estimate the proportion of all Oxnard University students who watch more than 10 hours of television each week within ±3 percent with 99 percent confidence = 1727 students.

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3 years ago
Shelly is tying to improve her running time for track race. She ran the first race 43.13 seconds. Her time was 43.1 seconds in t
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Answer:

42.77

Step-by-step explanation:

The pattern is taking away 0.3. 43.07 minus 0.3 equals 42.77

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3 years ago
there are x kids on the wrestling team.yesterday y kids were out sick.what fraction of the kids were absent yesterday
Grace [21]
Y/x kids were absent yesterday
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X^2+25x-156=0 ayúdenme
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X= -25/2 + 1/2 _/1249
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Answer:

Square 63 is, 7.93725393319

Step-by-step explanation:

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