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Alien Signals need Math Wizz to Solve


The Warkworth Radio Astronomical Observatory is located about 50 km north of Auckland, New Zealand. It is operated by the Institute for Radio Astronomy and Space Research, Auckland University of Technology. Here is a picture of it: Task 1: Which shape – the parabola (C) or circle (D) best fits the shape of the telescope? […]

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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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