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
Kitty [74]
2 years ago
11

Alon and his friend Marna own a chimney sweep service company. Working together, they can clean a 20-foot chimney in 1 Five-seve

nths hours. If it takes Kalon 4 hours to clean a 20-foot chimney by himself, how long does it take Marna to clean the same size chimney by herself?
Mathematics
2 answers:
Akimi4 [234]2 years ago
6 0

Answer:

3 hours

Step-by-step explanation:

Given that:

Time taken by Kalon = 4 hours

Time taken by Marna =?

Time taken if the work together = 1 5/7 hours

Kalon's rate = 1/ time =. 1/4

Kalon + Marna = 1 ÷ 1 5/7 = 7/12

Hence,

Marna's rate = 7/12 - 1/4

Marna's Rate = (7 - 3) / 12 = 4/12 = 1/3

Marna's rate = 1/3

Hence, time it takes Marna = reciprocal of rate = 1÷ 1/3 = 1 * 3/1 = 3 hours

kykrilka [37]2 years ago
4 0

Answer:

3 hours

Step-by-step explanation:

You might be interested in
Point J is on line segment I K ‾ IK . Given J K = x + 6 , JK=x+6, I J = 9 , IJ=9, and I K = 2 x , IK=2x, determine the numerical
denpristay [2]

Answer:21

Step-by-step explanation:

4 0
3 years ago
5. Marie buys 2 pounds of turkey and 1 pounds of ham. She pays a total of $20,
NARA [144]

Answer:Let t = cost per pound of turkey

Let h = cost per pound of ham

 

4t + 2h = 30

t = h - 1.5

 

substitute h-1.5 in place of t in 1st equation

 

4(h-1.5) + 2h = 30

4h - 6 + 2h = 30

6h - 6 = 30

6h = 36

h = 6

 

t = h-1.5 = 4.5

 

1 pound of turkey costs $4.50

1 pound of ham costs    $6.00

                                ----------

cost of 1 pound each  $10.50

Step-by-step explanation:

8 0
2 years ago
A map distance of 5 inches represents 200 miles of actual distance . Suppose the distance between two cities on the map is 7 inc
Naily [24]
\frac{5}{200} = \frac{7}{x} \\ 5x = 1400 \\ x = 280

therefore, the actual distance is 280 miles. 

(sorry, idk the rule for it)
7 0
3 years ago
Read 2 more answers
One ball is drawn from a bag containing 4 red balls numbered 1–4 and 10 white balls numbered 5–14. Find the following probabilit
omeli [17]

Step-by-step explanation:

9 in total numbers can't be divided by 3...

therefore your probability will be = 9/14

= 0.64

8 0
3 years ago
4.56 × 10^3 into standard Form​
Murrr4er [49]

Answer: As well as very large numbers, standard form also deals with very small numbers: 4.56 x 10-3 is 4.56 ÷ 1000 = 0.00456.

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Which numbers are the means of the proportion shown below 2/3 = 20/30
    5·2 answers
  • Estimate. then find the sum. 1.20 plus 0.34
    10·2 answers
  • Which equations are correct
    14·1 answer
  • HELP! !! How are angle 1 and angle 2 related?
    14·2 answers
  • Which point lies on the line described by the equation below? y + 3 = 2(x - 1)
    10·2 answers
  • The values in the table below will be used to produce a line on a coordinate plane. what is the rate of change of the line produ
    12·1 answer
  • Gwenyth deposited money into her savings account that is compounded annually at an interest rate of 15%. Gwenyth thought the equ
    8·1 answer
  • Jason, Joel and John share $100.80. Joel has $3.45 more than Jason. John has three times as much money as Joel. How much does Jo
    5·1 answer
  • What is 16/1 x 3/1?...
    9·1 answer
  • Four weeks into her attempt at saving money, she has saved $160. Has Suzanne been saving enough money
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!