Whats 1/4 of 1/5 PLS HURRY I WILL MARK YOU BRAINLIEST

What is the 12th term of b(n)=-4-2(n-1)

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%

Ireally need subtract and simplify.(-y^2 – 4y - 8) – (-4y^2 – 6y + 3)show your work, ! i will mark you brainliest but you have to show your work.