Answer:
Step-by-step explanation:
I think your answer is y/8. It's a little unusually worded. If this is not correct, please leave a note.
The way I have answered it, I would word it as "What is the quotient of y divided by 8."
40 cm = 400 mm, so 400 mm / 18 mm = 200:9, or 22.22:1.
Let us convert the percentages to decimal format first.. so 5% is just 5/100 or 0.05 and 15% is just 15/100 or 0.15
so hmmm, so, let's say it needs "x" amount and "y" amount of each respectively, so, whatever "x" and "y" are, they must add up to 100, and whatever their concentration is, must add up to what the mixture yields
thus

solve for "x"
what's "y"? well, y = 100 - x
Answer:
d
Step-by-step explanation: