Answer:
1. 1 < 8
2. 7 > -17
3. n-6 (N could be 7)
4. -4 x 3= -12
5. -5/5= -1 since the sign means greater than or equal to, that could be right.)
6. 3>Z (1) - 1
Answer: the correct answer is A. :-)
Step-by-step explanation:
4/9 divided by 4 is 1/9.
Answer: choice A. 40 liters
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Explanation:
x = number of liters of the 50% alcohol solution
If we have x liters of 50% alcohol, then we have 0.50*x liters of pure alcohol. This is added to 0.90*40 = 36 liters of pure alcohol (from the 90% solution).
So far we have 0.50*x + 36. This expression represents the total amount of pure alcohol. We want a 70% solution, so we want 70% of the total 40+x meaning 0.50*x + 36 is to be set equal to 0.70*(40+x) and we solve for x as shown below
0.50*x + 36 = 0.70*(40+x)
0.50*x + 36 = 0.70*(40)+0.70*(x)
0.50*x + 36 = 28+0.70*x
36 - 28 = 0.70*x - 0.50x
8 = 0.20x
0.20x = 8
x = 8/0.20
x = 40
So that is why the answer is choice A. 40 liters
Answer:
Neither
Step-by-step explanation:
They both have the same probability because 2/5 and 0.4 have the same value.
