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Posts tagged with models

Mathematics, with a Shot of Espresso

January23

“I don’t need math ’cause I’m just going to work as a barista!” Don’t be too hasty in making a statement like this until you read this article: “An espresso is one of the most popular ways to drink coffee, but also the most complicated to make.The process depends on a delicate combination of factors […]

Mathematicians take notice

June11

The Notices is the world’s most widely read magazine aimed at professional mathematicians. Notices provides opportunities for mathematicians and students of mathematics to find out what is going on in the field. Each issue contains one or two such expository articles that describe current developments in mathematical research, written by professional mathematicians. The Notices also […]

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Scientists Make Tractor Beam To Control Floating Objects!

August15

Physicists at Australian National University have taken a bold step toward “Star Trek” tech with their latest invention — a water-based tractor beam that could eventually be used to clean up oil spills and control floating objects. “We have figured out a way of creating waves that can force a floating object to move against […]

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Calculus and 3 types of Math Models

August22

  Why do we learn Mathematics? Why is Calculus important? How does Mathematics help in designing spacecraft? What are some practical applications of the kind of mathematics I might do when I get to college? Click on this short video for some ideas!

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The Mathematics of Sailing

July20

As the previous post indicated, Mathematics is at the heart of every top sport – whether in the data collection and analysis or in the calculation of successful equations to balance performance against each parameter. In this article from WhyDoMath the goal in yacht design is to find the most efficient shape of the hull its […]

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New Math Model puts Earth into a Spin

May14

The centre of the Earth does not spin at a constant rate, new Australian National University research has found. The world-first conclusions – which used a new mathematical method to interpret earthquake waves from five decades – found the 1980s was a slow decade for inner core movement, while recent years had seen the strongest speed-up. Read […]

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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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