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Posts tagged with math tools

Instant solutions at mathway.com

October17

Mathway boasts that it “provides students with the tools they need to understand and solve their math problems. With millions of users and billions of problems solved, Mathway is the #1 problem solving resource available for students, parents, and teachers.” What does H3 think? Yes, this is a useful problem-solving tool and the graphical functions […]

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The Good Chalk Talk on Mathematics

May6

Amazing that having the right chalk can make a mathematician work better and feel happier. After all, when has Mathematics been about ‘feeling’? Actually, it is ALL about feeling – about feeling confident, about feeling like taking risk, about feeling good when solving problems and feeling great at a mathematical revelation while sitting at the […]

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One Apple 1 is very special

October23

At the calculating roots of our high school math courses was a rather crude looking computer called the Apple 1. Guess what? A model of the Apple-1 (above) recently sold for a stratospheric \$US905,000 by Bonhams auction house! This was a working model of the Apple-1 and among the 50 models that were assembled by […]

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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)?]