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
mars1129 [50]
2 years ago
5

How many gallons of pure water should be evaporated from 160 gallons of a solution containing 12% salt so that the remaining sol

ution contains 20% salt?
What are you being asked to find in this problem?

gallons of pure water

gallons of 12% salt solution

gallons of 20% salt solution
Mathematics
2 answers:
Mnenie [13.5K]2 years ago
8 0

<u>Answer:</u>

The correct answer option is: 'gallons of pure water'.

<u>Step-by-step explanation:</u>

We are asked to find the number of gallons of pure water in this problem.

We know that the amount of salt that exists in the solution before the pure water is evaporated (0.12)(160) has to be equal to the amount of salt which is there after the evaporation takes place (0.20)(160-x).

Therefore, the number of gallons of pure water can be found using this equation:

(0.12) (160) = (0.20) (160-x)

algol [13]2 years ago
6 0

Answer:  It is asking the amount of pure water.

Amount of  pure water evaporated is 64 gallons .

Step-by-step explanation:

Let x gallons  be the amount of evaporated water.

Amount of water before evaporation

      =12% of 160

      = 0.12(160) = 19.2 gallons .......(1)

amount of solution after x gallon water evaporation  = 160-x

amount of salt in 160-x  solution =   20% of 160-x

                                                     =0.2 (160-x) ........... (2)

Since amount of salt will be same before and after evaporation

  from (1 )  and (2)

0.2(160-x) = 19.2

32-0.2x = 19.2

  -0.2x = 19.2-32

 -0.2x = -12.8

       x = -12.8/(-0.2)

       x   = 64  gallons


                 



You might be interested in
10. Which transformations result in a preimage and image with opposite orientations?
Airida [17]
Reflections and glide reflections both give you a transformation where the preimage and image have opposite orientations.
3 0
3 years ago
Read 2 more answers
When a constant force is applied to an object, the acceleration of the object varies inversely with its mass. When a certain con
maria [59]

First:

F=m.a

=4*7

=28N

Second:

F=m.a

28=m.2. (force is constant,so F=28N)

28/2=m

m=14kg.

5 0
3 years ago
Read 2 more answers
4x + 108 = 144 what is the value of x
ivann1987 [24]
Here is the correct answer.

4x + 108 = 144(equation)
     -108      -108 (Subtract 108 both sides)
4x = 36 (simplify)
/4      /4 (divide by 4)
x = 9 (Answer)
7 0
3 years ago
Read 2 more answers
What is the 12th term of the geometric sequence? 5, 15,15
statuscvo [17]

Answer:

S12=855735

Step-by-step explanation:

if the 3rd term is 45 then,

formula: Sn=ar^n-1

S12=5*3^12-1

S12=5*3^11

S12=5*177147

S12=855735

3 0
3 years ago
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!
Crazy boy [7]
1 and 3 are correct answers
3 0
3 years ago
Read 2 more answers
Other questions:
  • Monica can walk 3.8 kilometers in 40 minutes, and she can jog twice that distance in the same amount of time. How far could Moni
    11·1 answer
  • What is the slopeOf a line that is perpendicular to a line who’s equation is 8y-5x=11
    12·1 answer
  • What is 3 tenths in number form
    14·2 answers
  • The surface of a right cylinder is 324 pi cm^2. If the radius and height are equal, find the length of the diameter
    7·1 answer
  • How do you turn 0.8 into a fraction
    6·2 answers
  • Ilana needs d more dollars to buy a new scrapbook that costs $8.35. She has $4.88. Solve the equation $4.88+d=$8.35 to find how
    11·1 answer
  • Emily surveyed 364 people with 3 out of 7 answered yes
    13·1 answer
  • Please help me i need this grade !
    10·1 answer
  • A certain drug is made from only two ingredients: compound A and compound B. There are 5 milliliters of compound A used for ever
    11·1 answer
  • 9 A boy takes a penalty 40 times against a goalkeeper. He scores 16 times.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!