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Anna [14]
4 years ago
8

Nakita recorded a video of homecoming highlights of the senior class and now everybody wants a copy. She promised to have 25 rea

dy the next day but suddenly realized that it will take her ten hours to do that. Her friend, Abby, volunteered to help and she can do the job alone in 15 hours. How long will it take the girls, working together, to complete the job?
Mathematics
1 answer:
Simora [160]4 years ago
5 0

Answer: 6hours

Step-by-step explanation:

it will take Nakita 10 hours to get 25 copies of the video ready

Then it takes Nakita 25/10 per hour to get 25 copies ready

it will take Abby 15 hours to get 25 copies of the video ready

Then it takes Abby 25/15 per hour to get 25 copies ready

It is assumed that they are working individually and simultaneously. This means their work rate is additive.

Their combined work rate per hour is

25/10 + 25/15 = 5/2 +5/3

=25/6 per hour

Let x hours be the time it will take them to get 25 videos ready.

It will take them 25/x per hour to get the videos ready

Equating both expressions,

25/x =25/6

25 × x = 25 × 6

x = 6 hours

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Plot y= - 2/5x - 4 on a graph
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1. Find the circumference of a circle if the area is 300 square centimeters. A. 61.38 cm B. 56.25 cm C. 84.74 cm D. 9.77 cm
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HELPP MEEE PLEAAASEE
Elanso [62]

Answer:

probability of left handed female is

\frac{31}{140}

Step-by-step explanation:

you have 140 employees, and we know 65 employees are male. to work out how many female employees we minus 65 from 140 to get 75 female employees

140 - 65 = 75

we are told 31 females are left hand, to work out how many female are right handed we do 75-31 which equals 44 right handed females

75 - 31 = 44

if 90 of the total employees are right handed, and 44 females are right handed, in order to find how many males are right handed we do 90-44 which gives us 46 right handed males

90 - 44 = 46

to workout how many males are left handed, since we have 65 makes and 46 are right handed, just go 65-46 which gives us 19 left handed males

65 - 46 = 19

in order to find the probability of choosing a left handed female out if 140 employees, since we know there are only 31 left handed females out of 140 employees we just go

\frac{31}{140}

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Shane is goin to the movies with his friends.His mom give them $15.00 to spend on snacks. Drinks cost $2.00 each and candy cost
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➷ Simply divide the values:

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Shane can buy 7 drinks

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➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ Hannah ♡

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