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AURORKA [14]
2 years ago
15

A plumber and his assistant work together to replace the pipes in an old house. The plumber charges $30 an hour for his own labo

r and $20 an hour for his assistant's labor. The plumber works twice as long as his assistant on this job, and the labor charge on the final bill is $2000. How long did the plumber and his assistant work on this job
Mathematics
1 answer:
Korvikt [17]2 years ago
6 0

Answer:

The plumber worked 50 hours, and his assistant worked 25 hours.

Step-by-step explanation:

Since a plumber and his assistant work together to replace the pipes in an old house, and the plumber charges $ 30 an hour for his own labor and $ 20 an hour for his assistant's labor, and the plumber works twice as long as his assistant on this job, and the labor charge on the final bill is $ 2000, to determine how long did the plumber and his assistant work on this job the following calculation must be performed:

40 x 30 + 20 x 20 = 1200 + 400 = 1600

50 x 30 + 25 x 20 = 1500 + 500 = 2000

Therefore, the plumber worked 50 hours, and his assistant worked 25 hours.

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A teacher writes an inequality x divided by 6 < -2 on the board. Vincent incorrectly solves the inequality and obtains x <
scZoUnD [109]

The error Vincent made was that he only multiplied the left side of the inequality with 6 although he had to multiply on both sides

Step-by-step explanation:

Given inequality that the teacher wrote is:

\frac{x}{6} -2

Solving an inequality means that the variable should be isolated on left side of the inequality.

So multiplying both sides by 6

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Vincent got the answer is x<-2 = > The error Vincent made was that he only multiplied the left side of the inequality with 6 although he had to multiply on both sides

Keywords: Inequality, solution

Learn more about inequalities at:

  • brainly.com/question/9214411
  • brainly.com/question/9196410

#LearnwithBrainly

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3 years ago
Find an equation of the line perpendicular to the graph of 14x - 7=4 that passes through the point at (2,9)
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Answer:

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Step-by-step explanation:


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3 years ago
2. In a recent survey conducted by the International Nanny Association, 4,176 nannies were placed in a job in a given year. Only
Natali [406]

Answer:

There is a 0.57% probability that a randomly selected nanny who was placed during the last year is a male nanny (a "mannie").

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

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Desired outcomes:

The number of male nannies selected. 24 of the nannies placed were men. So the number of desired outcomes is 24.

Total outcomes:

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There is a 0.57% probability that a randomly selected nanny who was placed during the last year is a male nanny (a "mannie").

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3 years ago
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