(r/s)(3)=

don’t understand what it’s asking

What is the point-slope equation of a line with slope -5 that contains the point (6,3)

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%