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Archive for November, 2014

Math Doesn’t Suck – Danica McKellar

November1

Have you ever sat in class and then the teacher passes by, looks at your cramped up math working and then sucks in their breath as if to say, “Oh dear?” Well, this just might be the instruction you need! This little video (click to link) by Danica McKellar made some great, helpful tips for […]

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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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