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Die Hard Challenge (from Maths Digest) – Help Zeus and John get 4 gallons of water!

October25

The Script. Simon>¬†On the fountain, there should be 2 jugs, do you see them? A 5 gallon and a 3 gallon. Fill one of the jug with exactly 4 gallons of water and place it on the scale and the timer will stop. You must be precise, one ounce of more or less will result […]

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NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

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