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
kotykmax [81]
3 years ago
13

The Doe family is ready to fill their new swimming pool. It can be filled in 12 hours if they use their own water hose, and in 3

0 hours if they use Mr. Jones', their neighbor's water hose. How long will the Doe's take to fill their pool if the neighbor's hose is used along with their own?
Mathematics
2 answers:
aivan3 [116]3 years ago
3 0
6 & 1/2 hours should be the correct answer! :]
Zepler [3.9K]3 years ago
3 0
Doe's swiming pool can be filled in 12 hours
so doe's rate is 1/12 pool per hour
basicallly, in 1 hour, 1/12 of the pool if filled


the jonesles take 30 hours
so 1/30 pool per hour
basically in 1 hour, 1/30 of the pool is filled


so 

combined
1/12+1/30
find common denom
12=2*2*3
30=2*3*5
common denom=2*2*3*5=60

1/12 times 5/5=5/60
1/30 times 2/2=2/60
so

add the rates
in 1 hour, a total of 1/12+1/30 or 5/60+2/60=7/60 pool per hour


so
7/60 pool per hour

amount=rate times time
we want 1 pool to be filled
rate is 7/60 pool per hour
t=time

1=7/60 pool per hour times t
times both sides by 60/7
60/7=t
8.57142857143=t
takes about 8.57 o 8.6 hours
You might be interested in
jared attempted 20 free throws during basketball practice. He made 16 of his shots and missed the rest. What percentage of the f
Akimi4 [234]
The answer is 20% because 4/20 equals 1/5 which is 20%
6 0
3 years ago
Read 2 more answers
They are all simplest terms
NikAS [45]

Step-by-step explanation:

- 3(s - 10) + 7( - 2s - 1)

- 3s  + 30  - 14s - 7

- 17s + 23

is the required answer.

Distributive Property was used here.

Hope it Helps :)

7 0
3 years ago
What is 108320 x 109e34
ArbitrLikvidat [17]

Answer:

The answer is 1.180688e+41

Step-by-step explanation:

This was what google give me lol.

<em>sorry</em><em> </em><em>if</em><em> </em><em>im</em><em> </em><em>wrong</em><em>. </em>

8 0
3 years ago
Read 2 more answers
ANSWER ASAP!!!! <br><br> Thank u
Vinvika [58]

Answer: 20 cm

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Please can anyone help answer this question? It would be greatly appreciated!!! :)
Ray Of Light [21]

Answer:

0.667

Step-by-step explanation:

Angle in a circle = 360°

Area of total shaded parts = 60 + 60 = 120°

Area of total unshaded parts = 360-120 = 240°

Probability that a random selected point within the circle falls in the unshaded area

= 240/360

= 2/3

≈ 0.667

I apologize in advance if I made a mistake.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Please help!
    5·1 answer
  • 7. The volume in cubic feet of a box can be expressed as (x) = x3 - 6x2 + 8x, or as the
    12·1 answer
  • Help with 5 and 6 please
    11·1 answer
  • The expression x - 2 is a factor of p(x) = x 5 - 4x 3 + 2x 2 - 4x + 1 true or false
    6·1 answer
  • I'm just confused on how to start this first of all and then get the right answer
    7·1 answer
  • Help pleaseee and thankyouuuu
    11·1 answer
  • HELP ASAP!!simplify the following<br>(-8z)^2
    14·1 answer
  • Can someone help me with this
    15·1 answer
  • Y to the power of 3=64
    12·2 answers
  • What is [2(7.25) + 2 (24)] - 10 ?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!