Distance between the lower and upper grade
What are the question marks?
I got -1
Simplify the expression using the definition of an imaginary number.
Answer:
Therefore 40 milliliter of 50% fungicide solution is required
Therfore 60 milliliter of 10% fungicide solution is required
Step-by-step explanation:
i) Let the 10% fungicide solution have x milliliter and the 50% fungicide solution have y milliliter.
ii) Therefore 10x + 50y = 26(x + y)
x + y = 100
iii) form the first equation in ii) we get
16 x = 24 y Therefore 
iv) substituting the value obtained in iii) in the second equation in ii) we get

Therefore y = 100 ÷ 2.5 = 40 milliliter
Therfore x = 100 - 40 = 60 milliliter
Assuming the highest score for a test is 100.
Highest possible total scores for 4 tests = 71 + 78 + 81 + 100 = 330
Highest possible average score for 4 tests = 330 ÷ 4 = 82.5
Answer: 82.5
1/2lb: 5 serving of soups
3lb:?
3×5÷1/2=30. As a result, there will be 30 serving Mark can make. Hope it help!