Answer: 160 liters of the
40% solution and 80 liters of the 70% solution will be used.
Step-by-step explanation:
Let x represent the number of liters of 40% antifreeze solution that should be used.
Let y represent the number of liters of 70% antifreeze solution that should be used.
The volume of the mixture to be mixed is 240 liters. It means that
x + y = 240
The 40% antifreeze solution is to be mixed with a 70% antifreeze
solution to get 240 liters of a 50% solution. This means that
0.4x + 0.7y = 0.5(240)
0.4x + 0.7y = 120 - - - - - - - - - - - -1
Substituting x = 240 - y into equation 1, it becomes
0.4(240 - y) + 0.7y = 120
96 - 0.4y + 0.7y = 120
- 0.4y + 0.7y = 120 - 96
0.3y = 24
y = 24/0.3
y = 80
x = 240 - y = 240 - 80
x = 160
See also
brainly.com/question/8975313The decay factor is 1/2.
The change is (1/2 -1)*100% = -50% per period. Negative indicates a decrease of 50% per period.
For this case we have the following expression:
When multiplying to the power of 100 we have:
We have to:
0: Unit
0: Ten
9: Hundred
1: One thousand unit
2: Ten thousand
3: One hundred thousand
4: Million unit
8: Ten million
Thus, the unit digit is 0.
Answer:
0
B. Multiple both sides by -5/3
To answer this question we have to do the following:
15*80 = 1200 (multiply the number of current employes with the percentage)
1200 / 100 = 12 (divide by 100)
80 + 12 = 92 (add the percentage to the original amount of workers)
After the hiring is done, the total number of workers will be 92.
