exam Maths Puzzle Numerical Ability

expand by use of minors.
3 4 -2
6 4 3
0 4 2

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exam Other Question

Given:
(l ^ ~m)->p
q-> ~p
l
q
prove: m I need help with this question too!

Suppose you are copying a photograph and would like to reduce it to 75% of its original siz. The function y=.75^x models the size of an image x number of times after it is reduced. Graph the function.