Qualification > Math

Math Heeelppp!!

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al noor:

--- Quote from: astarmathsandphysics on November 08, 2009, 04:54:34 pm ---bridge question a)50
b)250(500-250)800+60

These numbers seem incredible. For the next part I get a ridiculous percentage error.
Are you sure these questions are correct?

--- End quote ---

Well thats the worksheet that the teacher gave us

al noor:

--- Quote from: astarmathsandphysics on November 08, 2009, 05:09:31 pm ---b)i)30
ii)400
iii)10 and 50
iv) presumably x-60 so loss =-60^2+50+50-500=-500
vi)-x(x-30)^2+400
max profit of 400 at x=30

--- End quote ---

Thnkz aloott astar

Tyserius:
Here you go! For the first page :)

Dear astarmathsandphysics,

Would you mind helping me check it as well, sir? xD Just in case I make mistakes. By the way, the equation is fractional :)

Tyserius:
Dear al noor,

For the 2nd question part (a), once again, your graph is a parabolic curve with the symmetry at x=30. Therefore, that's where your maximum point will lie which is (30,400). It should begin at -500 and end there as well therefore, the starting point of the graph would be (0,-500) and the end point would be (60,-500)

EDIT : For the 2nd question part (c), the expression should be (x-30)^2 -400. There shouldn't be a -x outside. The connection is as stated by astar. :) I'm trying to figure out the part where they ask for the loss when toys are given away though.

astarmathsandphysics:
It should say y = x(500-x)/800 + 50

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