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Hatshy [7]
3 years ago
8

It takes 15 electricians 24 days to wire a new housing subdivision. How many days would 18 electricians take to do the same job,

assuming all electricians work at the same pace?
Mathematics
2 answers:
malfutka [58]3 years ago
8 0
So to set up this equation, you have to do
Time1*Workers1=Time2*Workers2
In this case, Time1=24 days, Workers1=15 electricians, and Workers2=18 electricians, and we have to solve for Time2

Thus we get 15*24=18*Time2
Time2=15*24/18=20 days
Ne4ueva [31]3 years ago
7 0

Answer:

20 days

Step-by-step explanation:

1)Set up the equation:

Time1xWorkers1=Time2xWorkers2

2)Apply the given:

Time1=24 days, Workers1=15 electricians, and Workers2=18 electricians.

3) Acknowledge the problem: We have to solve for Time2

4)Write the equation:

15*24=18*Time2

Time2=15*24/18

=20 days------> your answer

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xz_007 [3.2K]

Answer: \dfrac{1}{4}

Step-by-step explanation:

Given

The total no of beads is 52

there 13-red,13-blue,13-green, and 13-black

favorable outcomes to select a blue bead is 13

Total outcomes are 52

Probability is given by

P=\dfrac{\text{favorable}}{\text{Total outcomes}}\\\\\Rightarrow P=\dfrac{13}{52}=\dfrac{1}{4}

7 0
2 years ago
Choose the set of numbers with an average of 8.
Anastaziya [24]
The correct answer is B

To find the average we add all the given numbers together then divide by how many numbers there are.

A is 7

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C is 9
5 0
2 years ago
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Consider the expression? <br> Please help me !
Arada [10]

Answer:

sqrt(-8x+5)

Step-by-step explanation:

(5-8x)

-----------------

sqrt(-8x+5)

We need to rationalize the denominator

(5-8x)               sqrt(-8x+5)

----------------- * ---------------

sqrt(-8x-5)         sqrt(-8x+5)

(5-8x)               sqrt(-8x+5)

----------------- * ---------------

(-8x+5)

The first term cancels

sqrt(-8x+5)

8 0
3 years ago
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Write an inequality for the given statement: The sum of x and 25 is less than 75.
Kaylis [27]
That statement would be best express by " x + 25 < 75 ". Since the statement says the sum of x and 25, thus, it will be x + 25. Then it also states that the sum is less than 75, so the best expression would be " < 75".
4 0
3 years ago
Lexie, a bowler, claims that her bowling score is more than 140 points, on average. Several of her teammates do not believe her,
Crazy boy [7]

Answer:

The  test statistic is  t  = 3.744

Step-by-step explanation:

From the question we are told that

  The population mean is  \mu  =  140

  The  The  level of significance is  \alpha  =  0.05

  The  sample size is  n =  18

   The  null hypothesis is  H_o :  \mu =  140

    The  alternative hypothesis is  H_a  :  \mu > 140

    The sample mean is  \= x  =  155

     The  standard deviation is  \sigma  =  17

Generally the test statistics is mathematically represented as

       t  =  \frac{\= x  - \mu }{ \frac{ \sigma}{ \sqrt{n} } }

substituting values

      t  =  \frac{ 155  - 140 }{ \frac{ 17 }{ \sqrt{18} } }

      t  = 3.744

7 0
3 years ago
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