## Welcome to H3 Maths

Blog Support for Growing Mathematicians

## Posts tagged with ranking

### The leaning power of PISA

May12

When I was at university one of our senior lecturers was a widely recognized Coastal Geomorphologist. In other words, he was an expert on coastal landforms. I don’t remember anything he taught but I do remember vividly a story he told – which in itself is food for thought for how we teach Mathematics? The […]

by posted under Uncategorized | tagged under , , , , ,  |  Comments Off on The leaning power of PISA

### Well done, Andy but watch the Math Ranking

July9

Congratulations must go to Andy Murray for his win at Wimbledon this year. Researchers from the Miguel Hernández University of Elche have used mathematical techniques and game statistics from the Association of Tennis Professionals (ATP) to rank tennis players based on assessing their play. Their results complement the ATP ranking obtained on the basis of matches […]

by posted under Uncategorized | tagged under , , , ,  |  Comments Off on Well done, Andy but watch the Math Ranking

#### 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)?]