Answer: 20 L of 33% solution and 60 L of 5% solution should be mixed
Step-by-step explanation:
0.33x + 0.05(80-x) = 0.12*80
0.33x + 4-0.05x = 9.6
0.33x - 0.05x = 9.6-4
0.28x = 5.6
x = 5.6/0.28
x = 20 L of 33% solution should be used
80-20 = 60 L of 5% solution should be used
<u>Proof:</u>
0.33*20 + 0.05*60 = 0.12*80
6.6 + 3 = 9.6
9.6 = 9.6
Answer:
15.2
Step-by-step explanation:
<span>3x+y=5
x -y=7
------------add
4x = 12
x = 3
</span>x-y=7
3 - y = 7
y = 3 -7
y = -4
answer
(3, -4)
Answer:
3a then the power of 3 thing i cannot do rn
Step-by-step explanation:
