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Posts tagged with equation

Math Formula for Climate Emergency

December2

When is an emergency really an emergency? If you’re the captain of the Titanic, approaching a giant iceberg with the potential to sink your ship becomes an emergency only when you realise you might not have enough time to steer a safe course. And so it is, says Prof Hans Joachim Schellnhuber, when it comes […]

Find x

December17

see Post Support for answer–>

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A Math cartoon for great discussion

April5

This cartoon prompted some really great discussion in my junior math classes…

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Math Equations Delay Flight

May8

An Italian maths professor was recently escorted off an American Airlines flight after a fellow passenger feared his mysterious scribbling on a notepad was evidence that he was a terrorist. In fact Guido Menzio was working on an equation connected with a presentation on price-setting he was due to present. He was flying from Philadelphia […]

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Making Sense of an Equation

July10

Use one straight line to make this following equation true (2 solutions possible) Note: Answer will be posted soon, unless someone else gets it first!

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Post Support

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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