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12345 [234]
3 years ago
7

Please Help! Gabe Amodeo a nuclear physicists needs 80 liters of a 30% acid solution. He currently has a 20% and a 60% solution

How many liters of each does he need to make the needed 80 liters of 30% acid solution?
Mathematics
2 answers:
adelina 88 [10]3 years ago
6 0
He needs 6 litres of the 20% and 2 litres of the 60% a simple trial and error method will do in this type of equation
Nataly [62]3 years ago
3 0
Let x be the number of liters needed from the first acide concentration (20%)
Let y be the number of liters needed from the first acide concentration (60%)

We know at the end we will have:
x+y = 80 ; we also know that:
20%(x) + 60%(y) = 30%(80) OR 0.2x + 0.6y = 0.3(80) = 2x+6y=240

Hence we have :
x+y = 80
2x+6y = 240
Solving this system of 2 equations give: x = 60 and y = 20
In short you need to mix 60 litres at 20% and 20 liters at 60%

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Which do you think will have a greater value, 1/8 of one pound gold or 1/4 of lead? Why?
Ivenika [448]
<span>if you multiply 1/8 by 4, the fraction become 4/32, and if you multiply 1/4 by 8 you get 8/32.Since both fractions have the same denominator, we can find which fraction has the greater value. Since 1/4(8/32) has a greater numerator, the 1 pound of lead will have a larger value.</span>
4 0
3 years ago
Solve for b.
MakcuM [25]
Fortnite rctcyvlxcgtcyy
8 0
3 years ago
Read 2 more answers
A
rjkz [21]

The other leg is 12cm long.

Step-by-step explanation:

Given,

Hypotenuse = c = 15cm

One leg = a = 9cm

Other leg = b

As the triangle is right angled, therefore, using Pythagoras theorem;

a^2+b^2=c^2\\(9)^2+b^2=(15)^2\\81+b^2=225\\b^2=225-81\\b^2=144\\

Taking square root on both sides;

\sqrt{b^2} =\sqrt{144} \\b=12\ cm

The other leg is 12cm long.

Keywords: triangle, square root

Learn more about triangles at:

  • brainly.com/question/5461619
  • brainly.com/question/5510873

#LearnwithBrainly

3 0
3 years ago
??? Answers please.....
Paha777 [63]
The answer to this problem is 8 I believe. I hope you do good





3 0
2 years ago
CAN YOU ANSWER THIS PLEASE
BabaBlast [244]
It’s the absolute value of 0 and 5 because it’s the same absolute value the absolute vale is 5 for both 5 and -5 because absolute value of a number is the distance from 0 you can’t have a negative value
5 0
3 years ago
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