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Andrews [41]
3 years ago
11

Ms. Williamson woke up one morning to find her basement flooded with water. She called two different plumbers to get their rates

. The first plumber charges $36 just to walk in the door plus $28 an hour. The second plumber charges a flat $64 an hour.
a. What is the cost for each plumber if the job takes four hours?


b. How many hours did the first plumber take to do the job if he charged $176?


c. After how many hours will the cost for both plumbers be the same?
Mathematics
1 answer:
Oliga [24]3 years ago
6 0

Answer:

A. $148 for the first plumber for 4 hours. $256 for the second plumber for 4 hour

B. He did 5 hours

C. 1 hours because the flat rate plus the hourly fee adding it together will equal 64.

Step-by-step explanation:

Your welcome

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Further explanation:

A perpendicular bisector passes through the mid-point of a line so to get an ordered pair from which the perpendicular bisector will pass we need to find the mid-point of BC.

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Let m2 be the slope of perpendicular bisector

We know that the product of slopes of perpendicular lines is -1.

m_1.m_2 = -1\\1*m_2 = -1\\m_2 = -1

The standard form of point-slope form of line is:

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Putting the value of slope of bisector we get

y=(-1)(x)+b\\y=-x+b

To find the value of b, put the ordered pair (-1,3) in the equation

3 = -(-1) +b\\3= 1+b\\3-1 =b\\b=2\\

Putting the values of m and b in standard form

y=-x+2

Hence the equation of perpendicular bisector of BC is

y=-x+2

Keywords: Perpendicular bisector, Point-slope form

Learn more about point-slope form at:

  • brainly.com/question/7490805
  • brainly.com/question/8358304

#LearnwithBrainly

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