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
V125BC [204]
3 years ago
7

2 pipes running together can fill a cistern in 3 1÷3 min.if one pipe takes 3 min more than the other to fill it,find the time in

which each pipe would fill the cistern
Mathematics
1 answer:
charle [14.2K]3 years ago
8 0
It takes one pipe x minutes, the other pipe x+3 minutes
the portion filled per minute is by one pipe is 1/x, by the second pipe 1/(x+3)

when two pipes running together:
3&1/3[1/x+1/(x+3)] =1, 1 means the whole cistern
solve for x: 3&1/3(x+3) +3 1/3(x)=x(x+3)
6 &2/3 x +10 =x^2+3x
x^2- (3&2/3) x-10=0
3x^2-11x-30=0

this cannot be factored, so use the quadratic equation: 
x is about 5.5
x+3=8.5
You might be interested in
Two equations are given below: a – 3b = 9 a = b – 3 What is the solution to the set of equations in the form (a, b)?
Vilka [71]
A-3b=9
a=b-3

b-3-3b=9
-2b-3=9
-2b=12
2b=-12
b=-6

a=-6-3
a=-9

Solution: (-9,-6)
----
Check: 
-9=-6-3
-9=-9
TRUE


7 0
3 years ago
Read 2 more answers
Graph the two lines 2x + 3y = 18 , 3x -4y > 16.
Dmitrij [34]
The domain and range for each line is all real numbers. This is because all numbers are possible to input into x and all y values exist. 

The slope of the first line is -2/3 and the y intercept is 6. You can reach this conclusion by solving for y (putting it in slope intercept form). 

The slope of the second one is 3/4. and the y intercept is all real numbers greater than -4. This is true because it is an inequality and you can find these numbers by solving for y. 
7 0
3 years ago
Find the slope of the line and sketch the graph.<br><br> 3x + 4y = 25<br> (dont worry abt sketching)
polet [3.4K]
The slope is -3/4 .
Here’s the graph

3 0
3 years ago
Which is NOT a true statement?
Butoxors [25]
A

This is because 4x18 = 72
Hope this helps
6 0
3 years ago
Read 2 more answers
What is the degree of the polynomial? 5x² + 8x³ + 4- 6x² - 3x5​
geniusboy [140]

Answer:

The degree of polynomial is 5.

Step-by-step explanation:

I suppose the polynomial is \displaystyle{5x^2+8x^3+4-6x^2-3x^5}. To find the which degree this polynomial is, we consider the highest exponent of the term which is \displaystyle{3x^5}, the 5 is our highest degree of the term and thus, 5 is our highest degree of polynomial.

6 0
2 years ago
Read 2 more answers
Other questions:
  • 40 oz &gt; 3 lb true or false?
    5·1 answer
  • I've been stuck on this question for a while now, I need help!
    6·1 answer
  • Which is the correct letter answer of the value of the log equation?
    15·1 answer
  • Solve for y 5x+y=-10
    10·2 answers
  • Having trouble on these type of questions. an explaination would be greatly appreciated
    8·1 answer
  • PLEASE HELP ASAP it’s for distribution <br> Area model (algebraic) :(
    14·1 answer
  • Please help me!!! This is due at 11:59pm
    8·1 answer
  • Which expression is equivalent to 2(3 - x) - 12 + 4x<br><br> 3x - 6<br> 3x - 7<br> 2x - 7<br> 2x - 6
    6·1 answer
  • Please help me solve this.
    13·1 answer
  • I need help please. Trying to get my HS diploma. I did not graduate :(
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!