1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vichka [17]
3 years ago
15

Jane works twice as fast as her daughter Anna. If it takes 15 minutes to clean the kitchen together, how long would it take Anna

to clean the kitchen by herself?
Mathematics
1 answer:
Sonbull [250]3 years ago
7 0
Here, Twice fast means, she takes half time in doing same amount of work.
Let, Anna takes = 2t & Jane takes = t

It would be: 1/t + 1/2t = 1/15
2t + t / 2t² = 1/15
15(3t) = 2t²
2t² = 45t
Divide both sides by t, 
2t = 45
t = 45/2
t = 22.5
& 2t = 22.5(2) = 45

In short, Anna would take 45  minutes

Hope this helps!
You might be interested in
Find the smallest 0 of f(x+5). X=?
d1i1m1o1n [39]
Two hundred and ninety hope i helped
4 0
3 years ago
Kevin decides to build a square for his play park. If the area of the room is 4x^2 + 28x + 49 square feet, what is the length of
leva [86]
We have to factor becasue
area=legnth times width
area=4x^2+28x+49
area=(2x+7)(2x+7)
area=(2x+7)^2
legnth =width

we arent' given area so we can't solve
but, , since it is a squaer room, legnth=width so √area=legnth=width
8 0
3 years ago
Find the solution to the system 4x−7y=−12 −4x+3y=12
Nataly [62]

Answer:

(x, y) = ( -51/4 , -9)

Step-by-step explanation:

if u want me to show the work lmk

3 0
3 years ago
The graph of a quadratic function intercepts the x-axis in two places and the y-axis in one place.
LiRa [457]

Answer:

b

Step-by-step explanation:

5 0
3 years ago
The histogram below shows the number of sit-ups accomplished by sixth grade students in a physical fitness test. How many studen
Tresset [83]
Can you give a picture of the histogram?
7 0
3 years ago
Other questions:
  • Pls help me on his it’s is hard
    13·2 answers
  • Round to the nearest tenth.<br> 4.8367
    7·1 answer
  • Is Jerome’s sister correct? Explain why or why not, using examples from the ratio table to support your argument.
    8·1 answer
  • 815 gal/h = how many qt /s
    13·1 answer
  • I am sketching parabolas and my textbook is telling me that I need only two points. But I don't know how I am meant to sketch th
    11·1 answer
  • Help please!!! as part of a summer job, you stack crates. the crates have the same length and width but have heights of 1 or 2 f
    10·1 answer
  • Solve for a given 2e^a =4b
    7·1 answer
  • Roger has to place cookies in plastic bags for a bake sale. He has 84 sugar cookies and 66 chocolate chip cookies. He wants to p
    15·1 answer
  • *What is the perimeter of a square with side length 13.4 inches? Write the direct variation equation.
    14·1 answer
  • Jdnjdbbdidbd<br><br> 1 + 1/3=
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!