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Allisa [31]
4 years ago
12

A laboratory technician needs to make a 108​-liter batch of a 20​% acid solution. How can the laboratory technician combine a ba

tch of an acid solution that is pure acid with another that is 10​% to get the desired​ concentration?
Mathematics
1 answer:
Gala2k [10]4 years ago
6 0
<span>12 liters of pure acid and 96 liters of 10% acid solution Using mass and component balance: Let x = liters of pure acid and y = liters of 10% acid Mass balance: x + y = 108 Component balance: 100%*x + 10%*y = 20%*108 or x + 0.1y = 21.6 Solving for x and y: x = 12 and y = 96</span>
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luann talked on her cell phone for 180 minutes using 3/7 of her total monthly minutes. find out how many minutes she gets to tal
siniylev [52]

Answer: 420 minutes.

Step-by-step explanation:

The first method could be to do 180 / 3 then multiply that by seven:

180 / 3 = 60

60 * 7 = 420.

That solution would be to find out what 1/7 of her total monthly minutes is, and then multiplying it in order to get the total monthly minutes.

Another solution could be to divide 180 by 3/7:

180 / (3/7) = 420

6 0
3 years ago
How do you solve 7+3m=-29,-5x+7=27,31=4-9y,-52-3u=8,and 6-x=15. I know I'm asking for a lot.
lakkis [162]
Isolate the variable by putting numbers over the equal sign and multiplying/dividing. I'll do them for you
A. 7+3m=-29
3m=-29-7
3m=-36
M=-12
B. -5x+7=26
-5x=26-7
-5x=19
X=-3.8
C. 31=4-9y
31-4=-9y
27=-9y
-3=y
D. -52-3u=8
-3u=8+52
-3u=60
U=-20
E. 6-x=15
-x=15-6
-1x=9
X=-9
Hope this helps
4 0
3 years ago
Which of the following shows that the two composite figures cover the same area?
Nataly [62]

Answer:

We need to see the figures.

Step-by-step explanation:

We can't solve it without the pictures.

5 0
3 years ago
Read 2 more answers
Solve:<br> 6 = 8 + 2<br> a =?
nalin [4]

Answer:

4

Step-by-step explanation:

3 0
3 years ago
What is the name of the transformation shown?
Blizzard [7]
Reflection because it is directly mirroring the other side.
4 0
3 years ago
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