Question #de470
1 Answer
Kilos of rambutan:
Kilos of duku:
Kilos of langsat:
(see below for solution method)
Explanation:
Part a
Let
We are told the total cost (and individual per kilo costs); so:
Also the total weight:
And that the difference of the total cost of the duku and langsat minus the cost of the rambutan:
Part b
Setting this up as an augmented matrix:
and using the (hopefully) standard designations for the derived matrices:
Crammer's Rule tells us that (for example):
Here it is as evaluated in a spreadsheet: