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Musya8 [376]
3 years ago
7

In chemistry class 18 liters of 30% alcohol solution must be mixed with 20% solution to get 14% solution how many liters of 20%

solution are needed?
Mathematics
1 answer:
Virty [35]3 years ago
4 0
30% is needed because i believe it is i am really trying hope u get it right <span />
You might be interested in
EXPERTS/ACE PLEASE HELP!!
Zielflug [23.3K]
Hey!! I'm not Expert/Ace, but I am a Virtuoso so I hope I can help :p

Braden bought 18 pencils for $4.50
The number of pencils bought is x, and total cost is y.
x = 18      y = 4.5 
you would then plot the point (18, 4.5).
I am assuming that because you need a line, I will need to make another pencils bought/price. 
The point I made is (30, 7.5).
(You can get another point by dividing 4.5 by 18, and then using the result, .25 to see how much it would cost to by x amount of pencils.) 
Attached is the line I got by plotting both points, and connecting them :)
I hope I answered your question!!

5 0
2 years ago
Help with math pls pls pls
Andrews [41]

Answer:

  No; the lines have unequal slopes.

Step-by-step explanation:

You can see the appropriate answer by plotting the points on a graph. In the attached, the line through the blue points will have a different slope from the line through the red points.

4 0
3 years ago
Please help math I'm bad
gladu [14]

Answer:

6

Step-by-step explanation:

Square root of 10^2 - 8^2 is 6.

7 0
3 years ago
2.the solution set of x +y =5 and x-y =3
Nataliya [291]

Answer:

Check the solution below

Step-by-step explanation:

2) Given the equation

x +y =5... 1 and

x-y =3 ... 2

Add both equations

x+x = 5+3

2x = 8

x = 8/2

x = 4

Substitute x = 4 into 1:

From 1: x+y = 5

4+y= 5

y = 5-4

y = 1

3) Given

x+3y =15 ... 1

2x+7y=19 .... 2

From 2: x = 15-3y

Substitute into 2

2(15-3y)+7y = 19

30-6y+7y = 19

30+y = 19

y = 19-30

y = -11

Substitute y=-11 into x = 15-3y

x =15-3(-11)

x = 15+33

x = 48

The solution set is (48, -11)

4) given

x/2 +y/3 =0 and x+2y=1

From 1

(3x+2y)/6 = 0

3x+2y = 0.. 3

x+2y= 1... 4

From 4: x = 1-2y

Substutute

3(1-2y) +2y = 0

3-6y+2y = 0

3 -4y = 0

4y = 3

y = 3/4

Since x = 1-2y

x = 1-2(3/4)

x = 1-3/2

x= -1/2

The solution set is (-1/2, 3/4)

5) Given

5.x=1/2 and y =x +1 then solution is

We already know the vkue of x

Get y

y= x+1

y = 1/2 + 1

y = 3/2

Hence the solution set is (1/2, 3/2)

6) Given

3x +y =5 and x -3y =5

From 3; x = 5+3y

Substitute into 1;

3(5+3y)+y = 5

15+9y+y = 5

10y = 5-15

10y =-10

y = -1

Get x;

x = 5+3y

x = 5+3(-1)

x = 5-3

x = 2

Hence two solution set is (2,-1)

6 0
2 years ago
If someone treat at geometry has anyntime could you come answer my question
ki77a [65]
I am pretty good at any math and I love a good challenge. What is your question because I'd be glad to help!!!
4 0
3 years ago
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