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
kodGreya [7K]
3 years ago
9

A swimming pool can be filled in 15 hours if water enters through a pipe​ alone, or in 23 hours if water enters through a hose a

lone. If water is entering through both the pipe and the​ hose, how long will it take to fill the​ pool?
Mathematics
2 answers:
Brums [2.3K]3 years ago
8 0

Answer:

9.08 hours

Step-by-step explanation:

(23×15)/(23+15)

345/38

9.08 hours

kykrilka [37]3 years ago
4 0

Answer:

9.08 hours

Step-by-step explanation:

in order to fill 1 pool

fill rate by pipe = 1 pool / 15 hours = 1/15 pool per hour

fill rate by hose = 1 pool / 23 hours = 1/23 pool per hour

combined rate = fill rate by pipe + fill rate by pool

= 1/15 + 1/23 = 38/345 pool per hour

since:

38/345 pool ----------->  will take 1 hour

1 pool --------------------> will take 1 hour x (345/38) = 9.08 hours

You might be interested in
A six-sided number cube is rolled 900 times.
hram777 [196]

It is expected that a number greater than 4 will be rolled 300 times

The sample space of a die is:

S = {1,2,3,4,5,6}

The probability of obtaining a number greater than 4 is:

p = 2/6

p = 1/3

In 900 rolls, the expected number of number greater than 4 is:

E(x) = p *n

This gives

E(x) = 1/3 *900

E(x) =300

Hence, it is expected that a number greater than 4 will be rolled 300 times

Read more about expected values at:

brainly.com/question/15858152

8 0
3 years ago
Read 2 more answers
Can you find a number that satisfy the following property?
Morgarella [4.7K]

Answer:

11

Step-by-step explanation:

Let the number be x.

Then by the question,

2x+4 = 3x-7

x=11

3 0
3 years ago
Read 2 more answers
A group of students went to the fast-food restaurant after a game. They each ordered a 6-pc nugget entrée and a garden salad tra
marishachu [46]
I’m guessing you want to find out (n).
That’s what I did anyway.

The answer is: n=5

Step 1: Subtract 5n from both sides.
3.2
n
+
9
−
5
n
=
5
n
−
5
n
−
1.8
n
+
9
=
0
Step 2: Subtract 9 from both sides.
−
1.8
n
+
9
−
9
=
0
−
9
−
1.8
n
=
−
9
Step 3: Divide both sides by -1.8.
−
1.8
n
−
1.8
=
−
9
−
1.8
n
=
5
7 0
3 years ago
Solve an equation to determine the unknown quantity.
Montano1993 [528]
-75 times 5 = 30
Add 75 to 30 =105
105 divided by 5= 21
Kakapo should be 21 inches. Hope this helps sorry if wrong!
4 0
3 years ago
Product of 2.8 and 5.1
rewona [7]

Answer:

14.28

Step-by-step explanation:

2.8 times 5.1= 14.28

Hope this helps

-Amelia

3 0
3 years ago
Other questions:
  • I NEED HELP PLEASEAND STEPS
    6·1 answer
  • I NEED HELP ASAP
    6·1 answer
  • I need some help with sequences
    8·1 answer
  • Two similar polygons are shown below:
    9·2 answers
  • Is (2,4) a solution of 2x - 7y < -10
    12·2 answers
  • How many lines of symmetry are found in a regular polygon with 80 sides?
    13·1 answer
  • I need help with this please!!!
    8·1 answer
  • Please help
    10·1 answer
  • Help i need for a quiz please check image also
    13·1 answer
  • Can someone help me please
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!