Evaluate 7(-4) - |-6| + |4| A. 13 B.-18 C. -30
1 answer:
Hello there!
Answer: ⇒ C. -30
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Step-by-step explanation:
First you had to remove parenthesis.
Then you multiply by the number.
Apply absolute value.
Again apply absolute value.
Simplify it's should be the correct answer.
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Answer:
22.8 and 37.5
Step-by-step explanation:
Given the
The weights (in pounds) of 18 preschool children are
32, 20, 25, 27, 31, 22, 30, 23, 44, 37, 33, 45, 41, 24, 34, 21, 39, 29
To find its 20th percentile and 75th percentile.
In ascending order we get like this
Position X (Asc. Order)
1 20
2 21
3 22
4 23
5 24
6 25
7 27
8 29
9 30
10 31
11 32
12 33
13 34
14 37
15 39
16 41
17 44
18 45
Percentile position = (no of entries +1)20/100 = 19/5 = 3.8
Since posiiton is not integer we use interpolation method.
The value of 3.8 - 3 = 0.8 corresponds to the proportion of the distance between 22 and 23 where the percentile we are looking for is located at.
Hence 20th percentile =
So answer is 22.8
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75th percentile
Percentile posiiton = 19(75)/100 = 14.25
75th percentile=