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Alexxandr [17]
3 years ago
12

Plz help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 25 points!!!

Mathematics
2 answers:
Natalija [7]3 years ago
8 0

Answer:

u said 25 points

Step-by-step explanation:

...

melomori [17]3 years ago
6 0

Answer:

greg

Step-by-step explanation:

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Can someone plz help me solved this problem I need help plz help me! Will mark you as brainiest!
I am Lyosha [343]

Answer:

13 l of 15%, 13 l of 25%, 26 l of 70%

Step-by-step explanation:

solutions:

  • 15%, 25% and 70%

final solution:

  • 52 l of 45%

This includes 0.45*52l= 23.4 l acid

Let's assume:

  • amount of 15% solution= x
  • amount of 25% solution= y
  • amount of 70% solution= z
  • and we have z=2y

so there are 2 equation:

  • x+y+z=52
  • 0.15x+0.25y+0.7z=23.4

or

  • x+y+2y= 52 ⇒ x+3y= 52 ⇒ x= 52- 3y
  • 0.15x+0.25y+1.4y=23.4
  • 0.15x+1.65y=23.4
  • 0.15*(52-3y)+1.65y=23.4
  • 7.8-0.45y+1.65y=23.4
  • 1.2y=23.4-7.8
  • 1.2y= 15.6
  • y=15.6/1.2
  • y= 13 l

--------

  • x= 52- 3*13= 13 l
  • z= 2y= 2*13= 26 l
6 0
4 years ago
Write an equation in slope intercept form of the line that passes through the point (3,-1) and has a slope of 4
Usimov [2.4K]
The answer to this question is:

y = 4x - 13

4 0
3 years ago
Find the missing side
lorasvet [3.4K]

Answer:

I believe the answer is 48

Step-by-step explanation:

Subtract 30 from 78 to get your answer.

6 0
3 years ago
What is the mean and median of 73 45 88 90 90 81 83
notsponge [240]

Answer:

Mean = 78.5

Median = 83

3 0
4 years ago
Round 32.697 to the nearest hundredth and one.
velikii [3]
The nearest hundredth is 32.7

and the nearest ones place is 33
6 0
4 years ago
Read 2 more answers
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