## Welcome to H3 Maths

Blog Support for Growing Mathematicians

## Posts tagged with odds

### A Baby is Born 1 min into the New Year – What are the odds?

January1

As fireworks were fired off from Auckland’s Sky Tower to welcome 2018, the country welcomed the first baby of the new year. The healthy baby boy, weighing 3.5kg, was born at Auckland Hospital at 12.01am to a Howick couple on the first day of the new year. There are 526,600 minutes in a year, meaning […]

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### Jesus the Messiah? What are the odds, mathematically?

December7

What are the Odds? Professor of mathematics, Peter Stoner (June 16, 1888 – March 21, 1980), gave 600 students a math probability problem that would determine the odds for one person fulfilling eight specific prophecies. (This is not the same as flipping a coin eight times in a row and getting heads each time.) First […]

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### Spring is coming, but how do plants know?

February17

Spring is sprung The grass is riz I wonder where the Math is! Yes, there lies a puzzle. How do plants know it is time to blossom and accept that spring has arrived? As Bill Finch said, in a recent article on the Mathematics of Spring, “You won’t find your spring on a calendar. There […]

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### Parking illegally makes mathematical sense…huh?

December24

An article from cnet breaks this almost mathematical news, which just might be useful when you have finished Drivers Ed? “Anne Wojcicki, wife of Google’s Sergey Brin, says that she’s looked at the numbers and taking the risk of getting a ticket is worth it. We’re always calculating the odds. Chances she’ll love me in […]

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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)?]