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
Zina [86]
3 years ago
9

Joy is preparing 20 liters of a 25% saline solution. She has only a 40% solution and a 10% solution in her lab. How many liters

of the 40% solution and how many liters of the 10% solution should she mix to make the 25% solution?
Mathematics
2 answers:
olasank [31]3 years ago
5 0

Answer:

10 Liters of 40% solution

Step-by-step explanation:

Tresset [83]3 years ago
3 0

Answer:

10 liters of the 40% solution, and 10 liters of the 10% solution

Step-by-step explanation:

Let us say that x = the liters of the 40% solution, and y = liters of the 10% solution in her lab. We know that Joy is preparing a solution containing a total 20 liters, so x + y = 20. We can respectively create the following system of equations,

x + y = 20,

0.40x + 0.10y = 0.25 ( 20 )

And now we have to solve this system of equations for x and y, the liters of the 40% solution and the liters of the 10% solution,

\begin{bmatrix}x+y=20\\ 0.4x+0.1y=0.25\left(20\right)\end{bmatrix}  ( Substitute x as 20 - y )

0.4\left(20-y\right)+0.1y=0.25\cdot \:20\end{bmatrix} ( Isolate y )

8-0.3y=5 ⇒ 80-3y=50 ⇒ -3y=-30 ⇒ y = 10

x=20-10 = 10 ⇒ x = 10

Therefore, there are 10 liters of both the 40% and 10% solution.

You might be interested in
Carrie did sit-ups every for 5 days. The number of sit-ups she did on each day is shown on the table.
Nataly [62]

Answer:

32

Step-by-step explanation:

I mutiplied 2 to the 5th power and it equals 32

7 0
2 years ago
Is -2.22 a rational or real or integers
mezya [45]
All because -2.22 is a real number, it’s a rational number because it can stop and a integer because it’s negative
3 0
3 years ago
Read 2 more answers
Which of the following equations could you solve by first adding six and then dividing by negative three?
KiRa [710]
I think it’s c ::::::://:::::::::
8 0
3 years ago
Read 2 more answers
Select all possible values for x that solve the equation x^2=800
Gemiola [76]

x^2 = 800. Take the square root of each side.

x = √(800) and -√(800)

6 0
3 years ago
Choose the phrase that correctly completes this sentence.
alisha [4.7K]

Answer:

both loans and credit have to be paid back by the borrower

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Three fifths of the students voted for Kylie to become class president. two-thirds of those students were girls what fraction sh
    15·1 answer
  • Alice is three years old. Nate is half of the sum of Alice age and 5
    5·1 answer
  • Please answer this correctly without making mistakes
    10·1 answer
  • What is the value of X
    11·1 answer
  • What is the answer?
    15·1 answer
  • You are given 4 matrices M1, M2, M3, M4 and you are asked to determine the optimal schedule for the product M1 ×M2 × M3 ×M4 that
    14·1 answer
  • William invested $2,300 in an account paying an interest rate of 2 1/8% compounded quarterly. Nolan invested $2,300 in an accoun
    13·2 answers
  • Heather counted the number of crickets in her greenhouse every month and recorded the data in the table below.
    5·2 answers
  • Bridget is tracking the amount of time she works out at the gym each day. The lengths of her
    11·1 answer
  • Yo i need sum help question in picutre
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!