Answer:
50 % alcohol solution = 10 millimetres
30 % alcohol solution = 90 millimetres
Step-by-step explanation:
two equations can be derived from this question
x + y = 100 equation 1
0.3x + 0.5y = 100 x 0.32 = 32
0.3x + 0.5y = 32 equation 2
where :
x = 30% alcohol solution
y = 50% alcohol solution
multiply equation 1 by 0.3
0.3x + 0.3y = 30 equation 3
subtract equation 3 from 2
0.2y = 2
y = 10
substitute for y in equation 1
x + 10 = 100
x = 100 - 10
x = 90
Answer: 12
Step-by-step explanation:
18÷3=6
6+6=12
18+12=30
30-18=12
Answer:
, 2 , 4
Step-by-step explanation:
x = - 3 ≠ 2 , then
g(- 3) = × (- 3)² - 4 = × 9 - 4 = 
- 4 =
x = 2 then g(2) = 2
x = 4 ≠ 2 , then
g(4) = × 4² - 4 = × 16 - 4 = 8 - 4 = 4
Just secretly use a calculator... And show your working log square root of 2 and so on...
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