## Welcome to H3 Maths

Blog Support for Growing Mathematicians

## Posts tagged with technology

### Great Design, Great Passion with Steve Wozniak

December9

In this flashback video, Steve Wozniak takes us on a personal journey through the early years at Apple:

### Gadzooks – pushing camera sensors to their limit!

October23

News just in from dpreview.com: Sensor manufacturer OmniVisionhas created what has now been confirmedas the smallest commercially-available image sensor in the world by Guinness World Record. The OmniVision OV6948is an ultra-compact 1/36-inch backside-illuminated sensor that measures just 0.575mm x 0.575mm. The sensor, designed specifically for medical applications, features a resolution of 200 x 200 pixels, […]

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### Measurement works if you have the same units!

May23

The Mars Orbiter was lost in 1999 because the Nasa team used imperial units while a contractor used metric. The \$125m probe came too close to Mars during its orbit and was probably destroyed by the planet’s atmosphere. An investigation said the “root cause” of the loss was the “failed translation of English units into […]

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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)?]