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August 05, 2012
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## Resolved Question

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# Amir spent RM18 for a bottle of detergent, 2 pencils and 3 light bulbs while Siti spent RM12 for 3 bottles of?

Amir spent RM18 for a bottle of detergent, 2 pencils and 3 light bulbs while Siti spent
RM12 for 3 bottles of detergent, 2 pencils and a light bulb and Sarah spent RM9 for a
bottle of detergent, 4 pencils and a light bulb. If x, y and z represent the price per unit
for detergents, pencils and light bulbs respectively,

a)write a linear system from the above statements and transform it into a matrix
of the form AX = B.
b)find the inverse of marix A by using adjoint matrix
c)determine the price of each item by using the result in b)

2 years ago

by Zzonyx
Member since:
June 20, 2008
Total points:
51,852 (Level 7)

## Best Answer - Chosen by Voters

A miscategorized question - it belongs into the math or similar department.
100% 1 Vote

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