Using substitution how do you solve -4x+y=6 -5x-y=21

Convert 2000 swiss francs to dutch guilders

Which question is not a good survey question? a.don't you agree that the financial crisis is essentially over? 63on average, how many hours do you sleep per day? c. what is your opinion of educational funding this year? d.are you happy with the availability of electronic products in your state?

Atransformation t : (x,y) (x-5,y +3) the image of a(2,-1) is