exam Maths Puzzle Numerical Ability

3/4+5h=1/8

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exam Other Question

use the facts:
A=|a b|
|c d|,
then

A^-1=1/ad-bc|d -b|
|-c a| to find the inverse of the matrix, if possible. Check that AA^-1=I(base 2) and A^-1A=I(base2 hello

how do i determine whether each system is independen, inconsisitend, or dependent:

2x + 2y = 8
x + y = 4

thank you!