The answer is B because mean = 4+5+5+5+6 / 5 =5 and the mode equals 5
N-10 because you want to take 10 away from n
Y=5-2x
x^2 + (5-2x)^2 = 25
x^2 + 25-20x+4x^2 = 25
x^2 +4x^2-20x+25=25
5x^2 -20x=0
x=0 and y=5
you have to read the bottom link for the answer key