Answer:
7k -7
Step-by-step explanation:
-k-(-8k+7)
Distribute the minus sign to all terms in the parentheses
-k--8k-7
Ad negative negative is a positive
-k + 8k -7
Combine like terms
7k -7
Answer:
x<29
Step-by-step explanation:
divide both sides by -1 since x cannot be negative
Answer:
Step-by-step explanation:
Answer:
The answer is below
Step-by-step explanation:
Since 1000ml Of Dextrose 25% is needed to be produced from Dextrose 70%. Let us assume that x ml of Dextrose 70% is mixed with a Dextrose 5% to get 1000 ml of Dextrose 25%. Hence:
The amount of Dextrose 5% = 1000 ml - x ml = 1000 - x
25% of 1000 ml = 70% of x + 5% of (1000 - x)
25000 = 70x + 5000 - 5x
Simplifying gives:
65x = 25000 - 5000
65x = 20000
x = 308 ml
Therefore 308 ml of Dextrose 70% was mixed with 692 ml of Dextrose 5% to produce 1000 ml of Dextrose 25%.
The third one is the answer
