How much water must be added to 1 litre of 5% cordial mixture to produce a 4% cordial mixture?
1 answer:
Answer:
X=1/4L OR 0.25L OR 250ml.
Step-by-step explanation:
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Hello,
y²+4y+4=7
==>(y+2)²-7=0
==>(y+2-√7)(y+2+√7)=0
==>y=-2+√7 or y=-2-√7
