## Welcome to H3 Maths

Blog Support for Growing Mathematicians

### How numbers change the value of something!

March11

This Sideswipe entry caught H3’s attention;
“I had a neighbour… who put a fridge out on the (roadside) berm with a ‘free‘ sign and it stayed there for five days.  He took it back in for a few days then put it back on the berm with a sign showing ‘\$25‘ and a phone number. It was stolen within 20 minutes.

It’s all in the marketing (with Mathematics!).”

by posted under Uncategorized | Comments Off on How numbers change the value of something!

#### Post Support

The graph on the left (Coronavirus) is for a time period of 30 days, while the one on the right (SARS) is for 8 months! Very poor graphical comparison and hardly relevant, unless it is attempting to downplay the seriousness of the coronavirus?

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)?]