PLS Help! 30 points!

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let u=PQ be the directed line segment from P(0,0) to Q(9,12) and let c be a scalar such that c<0. what quadrant is the terminal point of vector c u in?

Do graduates from uf tend to have a higher income than students at fsu, five years after graduation? a random sample of 100 graduates was taken from both schools. let muf be the population mean salary at uf and let mufsu be the population mean salary at fsu. how should we write the alternative hypothesis?

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

Analyze the diagram below and complete the instructions that follow. how to find tan