baseballjay20oyr38t baseballjay20oyr38t
  • 01-11-2017
  • Mathematics
contestada

one maid can clean the house three times faster than another. Working together they can clean the entire house in 3 hours. How long would it take the faster maid cleaning alone?

Respuesta :

EchoFlower
EchoFlower EchoFlower
  • 01-11-2017
Faster maid DATA:
time = x hr/job ; rate = 1/x job/jhr
Slower maid DATA:
time = 3x hr/job ; rate = 1/3x job/hr
Together DATA:
time = 3 hr/job ; rate = 1/3 job/hr
Equation:
rate + rate = together rate
1/x + 1/3x = 1/3
Multiply thru by 3x to get:
3 + 1 = x
x = 4 hrs (time for the faster maid to do the job)
Answer Link

Otras preguntas

What part of the narrative arc introduces the Reader to main conflict of the story? A. Exposition B. Complicating incident C. Resolution D. Rising action
The distance between P and T on the coordinate grid is ___ units. (Input whole numbers only.) Image of a coordinate grid with point P located at negative 10,
3rd grade math explain how you know if a number can be divided by 10 evenly
The Piedmont region is represented by which number on this map of Georgia? Question 2 options: 1 2 3 4
What term is used to describe nonfiction written works such as newspaper articles, essays, and biographies? a. analytical b. explanatory c. expository d. pe
The sum of a number and 12 is 20. What is the number?
Factor the expression. k2 + kf – 2f2
Where does the developmental life stage of emerging adulthood usually appear?
A company's prime costs total $4,800,000 and its conversion costs total $8,800,000. if direct materials are $1,900,000 and factory overhead is $5,900,000, then
How does norcom describe Harriet