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
A package of 5 crackers contains 205 calories.how many calories are in one cracker
natulia [17]

The answer is 41

All u do  is divide 205 by 5 which will equal 41


6 0
3 years ago
Write the equation of the circle with center (0,0) and (-1,-3) a point on the circle
saw5 [17]

Answer:

Equation of given circle :-  x² + y² = 4

Step-by-step explanation:

The equation of the circle with center (0, 0) and radius r is given by,

x² + y² = r²

It is given that, a  circle with center (0,0) and (-1,-3) a point on the circle

To find the radius of circle

radius r = √[(0 - - 1)² + (0 - -3)²] =√(1 + 3) =√4 = ±2

r = 2

<u>To find the equation of circle</u>

x² + y² = r²

x² + y² = 2²

x² + y² = 4

6 0
3 years ago
Read 2 more answers
What is 375 times 54 <br> Answer in 1 min
Olenka [21]
20250 is the answer I used​ calculate it in my brain I got u fam
4 0
2 years ago
Which value is closest to the perimeter of the window?
Daniel [21]

Answer:12.85 feet

Step-by-step explanation:

Since the diameter of the circle is 5ft, the perimeter of the full circle would be 5 times pi feet, or about 15.7 ft. However, since we're only look at a half circle, the perimeter of the half circle is half that or about 7.85 feet. The other part of the perimeter is the diameter itself, so we add 5ft, to get a total of 12.85 feet.

4 0
3 years ago
What is the geometric mean of 2 and 135
lys-0071 [83]

\bf \stackrel{\textit{geometric mean of 2 and 135}}{\cfrac{2}{x}=\cfrac{x}{135}\implies 270 = x^2}\implies \sqrt{270}=x

8 0
3 years ago
Other questions:
  • Solve for system of equations y=3x+49, y=7x+13
    12·2 answers
  • The range for the Kentucky temperature is ____
    15·2 answers
  • What is the radius? Esther &amp; jim plan to add a pond to there property. the area of the pond is 11 square meters. A) 3 B)√3 C
    9·1 answer
  • Helpppp... 4^3 x (100/25) - 5^0
    10·2 answers
  • If a force of 60 N is exerted on a 15 kg object, calculate the acceleration that the object undergoes. ________ m/s2 4 900 0.25
    15·2 answers
  • 24b+25 what Is the value of b
    13·1 answer
  • Suppose that your school's environmental club wants to travel to the state capital to participate in an Earth Day festival. The
    14·1 answer
  • The basketball team ordered two pizzas. They left 1/3 of one and 1/4 of the other uneaten. What amount of pizza did they have le
    7·1 answer
  • The Sine Function
    8·1 answer
  • Find AB using the segment addition postulate. Show all work in setting up and solving your equation.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!