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
sdas [7]
3 years ago
10

How much 20% solution needs to be added to a 60% solution to make 400 ml of a 40% solution

Mathematics
1 answer:
Scorpion4ik [409]3 years ago
4 0

Let x be the volume of 20% solution, y the volume of the 60% solution. We want a total volume of 400 mL in the final mixture, so

x+y=400

Each mL of either solution will contribute a corresponding concentration, and in the final mixture we want the 400 mL to have a 40% concentration, which means we should also have

0.2x+0.6y=0.4\times400=160

Solve the system and we get x=y=200\,\rm{mL}.

You might be interested in
The scale in the drawing is 2in:4ft. What are the length and width of the actual room find the area of the actual room
Marizza181 [45]
1:24  get them each doqwn 1 inch 24 inche = 2 feet
6 0
3 years ago
Read 2 more answers
Factor completely x3 + 8x2 − 3x − 24.
balu736 [363]

Answer:

x=8=2=3

Step-by-step explanation:

6 0
3 years ago
HELP AM BEING TIMED !!!!
Alja [10]

Answer:

Option B.

Step-by-step explanation:

It is given that triangle GFH has vertices G(2, –3), F(4, –1), and H(1, 1).

The triangle is rotated 270° clockwise using the origin as the center of rotation. So, rule of rotation is defined as

(x,y)\to (-y,x)

Now,

G(2,-3)\to G'(3,2)

F(4,-1)\to F'(1,4)

H(1,1)\to H'(-1,1)

So, the vertices of image are G'(3,2), F'(1,4) and H'(-1,1).

Therefore, the correct option is B.

3 0
3 years ago
Bob bought 24 hockey tickets for $83. Adult tickets cost $5.50 and child tickets cost $2.00. How many child tickets did he buy?
Digiron [165]

Answer:

14 kid tickets

10 adult tickets

Step-by-step explanation:

2.00*14=28

5.50*10=55

55+28=83

8 0
3 years ago
Simple and easy question<br> please help
Mrrafil [7]

Answer:

Volume = πr²h

= 3.14 * 5² * 4

= 314 cubic yards

6 0
3 years ago
Read 2 more answers
Other questions:
  • The area formed by a plane cutting through a solid perpendicular to its axis is a
    15·2 answers
  • If 4% of x equals 56, what is x
    15·1 answer
  • Please help!(30pts)(I NEED IT QUICK)Find the inverse of the given function:
    10·2 answers
  • What goes in the blank boxes
    9·1 answer
  • What is this answer to this
    15·2 answers
  • Help plz im sorry if im asking to many questions
    5·2 answers
  • The table shows a linear relationship between x and y
    8·1 answer
  • What's the equivalent expression after combining the like terms?<br> −3z−z
    10·1 answer
  • Anybody help me please
    9·2 answers
  • -12 divided by 4<br> ????
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!