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Posts tagged with cosmology

Galloping galaxies – Pt II

November2

The universe doesn’t look right. It suddenly looks . . . out of whack. The universe is unimaginably big, and it keeps getting bigger. But astronomers cannot agree on how quickly it is growing – and the more they study the problem, the more they disagree. Some scientists call this a “crisis” in cosmology. A […]

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And Modern Scientific Dialogue

April22

Euclid’s outdoor presentations are somewhat similar to modern day scientific and mathematical dialogue, where universities and institutes host “open” forums, such as this one at the opening of the Stephen Hawking Centre at The Perimeter Institute – a place in Canada where the frontiers of space are being explored by leading physicists. Free teacher resources […]

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10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

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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