## Welcome to H3 Maths

Blog Support for Growing Mathematicians

## Posts tagged with sailing

### America’s Cup where each millisecond counts for millions

December6

In 1851, a team from New York Yacht Club won a race around the Isle of Wight off the south coast of England. They beat 15 British boats to take the Hundred Guinea Cup, a silver trophy valued at £100. Of course, the British were ‘not amused’! Subsequently named the America’s Cup after the victorious […]

### America’s Cup by the Numbers

September25

The Formula 1 of yachting – the America’s Cup. Outstanding technology where the boats are now sailing over twice the speed of the wind. Also a victory as Oracle came from 1-8 wins behind to beat Team New Zealand 9-8. How did this ‘one of the greatest comebacks in sport’ happen? It was all down […]

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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)?]