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
Graph the system of inequalities. Then use your graph to identify the point that represents a solution to the system. x > 4 y
8_murik_8 [283]
The first thing you should do in that case is to graph both lines.
 Once graphed you must see which region of the Cartesian plane they meet their respective inequalities.
 The solution of the inequation system is the shaded region shown.
 The point sought is
 P = (5, -2)
 answer
<span> (5, –2)</span>

7 0
3 years ago
“write the equation for the line in slope-intercept form”
lapo4ka [179]

Answer:

The equation is 4x + 3 ....

6 0
3 years ago
The point-slope form of the equation of a line that passes through points (8, 4) and (0, 2) is y – 4 = (x – 8). What is the slop
ch4aika [34]
So slope intercept form is y=mx+b
m=slope b=y intercept
convert current equation to slpe intercept
y-4=x-8
add 4 to both sides
y=x-4
tada
6 0
3 years ago
Read 2 more answers
Can someone please tell me the correct answer.|-30| + |25| =
Mkey [24]

Answer:

55

Step-by-step explanation:

The absolute value of -30 is 30 and the absolute value of 25 is 25.

So you will end up with 30 + 25 which is 55.

7 0
3 years ago
How can you tell Is something is a unit rate
ArbitrLikvidat [17]

Unit rate is a ratio between two different units with a denominator of one. When we divide a fraction's numerator by its denominator, the result is a value in decimal form. For example: 8/4 = 2 and 3/6 = 0.5. When we write numbers in decimal form, we can write them as a ratio with one as the denominator.

For example, we can write 2 as 2/1, and 0.5 as 0.5/1. However, since that approach can be a little clumsy, we usually drop the one. That said, it's important to remember the one is there, especially when working with unit rates.

For instance, 8 miles/4 hours = 2 miles/hour. Notice again that, while we did not include the 1, we did include the unit 'hour' Miles per hour is a familiar expression, as are unit rates such as:

interest/amount invested

revolutions/minute

salary/year

Conversationally, the word ''per'' indicates we are using a unit rate.

4 0
3 years ago
Other questions:
  • 1:X = X:81 what number can replace X?
    5·1 answer
  • What are ratios of lengths of the longer leg of 30-60-90 triangle to the length of it hypotenuse
    13·1 answer
  • Find the lateral area of a regular pentagonal pyramid that has a slant height of 14 in. and a base side length of 6 in.
    13·1 answer
  • Find the value of the expression
    8·1 answer
  • Is every trapezoid a rectangle
    6·2 answers
  • Ik most of us have finals coming up. Some of us are stressing alot as well,
    7·1 answer
  • Hellqp plews u will be in the hall of fame if u help
    6·1 answer
  • Whats the answer to this ill give brainliest
    7·2 answers
  • Answers?
    11·2 answers
  • Question Progress Homework Progres 23/2 Solve the quadratic equation 3x + x-5 = 0 Give your answers to 2 decimal places.​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!