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Scilla [17]
3 years ago
8

Nancy's percentile rank on a science test was 78. this means that

Mathematics
1 answer:
lys-0071 [83]3 years ago
4 0
The percentile rank of a certain score is the score percentages in its frequency distribution that are equal to it or lower that it.

This means that:
<span>Nancy's percentile rank on a science test was 78. this means that Nancy equaled or surpassed 78% of all those who took the test.</span>
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Kazeer [188]

Answer:

A hope this helps

Step-by-step explanation:

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6 0
3 years ago
Pls help will mark brainliest, no fake answers
kotegsom [21]

Step-by-step explanation:

b = what Bernie earns per day = Php 1000

m = what Mitch earns on a given day

e = what Eugene earns on a given day

r = what Rowan earns on a given day

a.

t = the total earnings of Bernie and Mitch on a given day

t = m + 1000 (or m + b)

b.

e = m/2

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r = 2×(m + 1000) or 2×t

4 0
2 years ago
Bob and James are finishing the roof of a house. Working alone, Bob can shingle the roof in 14 hours. James can shingle the same
Snowcat [4.5K]

we know that Bob can do the whole job in 14 hours, how much of the work has he done in 1 hour only?  well since he can do the whole lot in 14 hours in 1 hour he has only done 1/14 th of the job.

we know that James can do it in 18 hours, a bit slower, so in 1 hour he has done only 1/18 th of the job.

let's say it takes both of them working together say "t" hours, so in 1 hour Bob has done (1/14) of the work whilst James has done (1/18) of the work, the whole work being t/t or 1 whole, so for just one hour that'd 1/t done by both Bob and James.

\bf \stackrel{Bob}{\cfrac{1}{14}}~~+~~\stackrel{James}{\cfrac{1}{18}}~~=~~\stackrel{total~for~1~hour}{\cfrac{1}{t}} \\\\\\ \stackrel{\textit{using an LCD of 126}}{\cfrac{9+7}{126}=\cfrac{1}{t}}\implies \cfrac{16}{126}=\cfrac{1}{t}\implies 16t=126\implies t=\cfrac{126}{16} \\\\\\ \stackrel{\textit{7 hrs, 52 minutes and 30 seconds}}{t=\cfrac{63}{8}\implies t=7\frac{7}{8}}\implies \stackrel{\textit{rounded up}}{t=7.88}

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3 years ago
Solve |9x | ≦ 81
goldenfox [79]
C is the answer cause 9 is the common factor
8 0
2 years ago
Find k if 3k, k-2, and k + 7 are consecutive terms of an arithmetic sequence.
ahrayia [7]
This is 1:25 (C)

Explanation:

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3 years ago
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