book Maths Puzzle Numerical Ability

simplify: 6-2i/1+i

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book Other Question

the problem i have is that i have a rectangle
piece of wood or steel then i was ordered to divided this piece
into some of regular shapes ( extract some regular
I have two word problems which I cannot decipher, please help?

1. Catrinas investment of $16,000 in an emerging market fund grew to $25,000 in 2 years. Find the average annual