Determina las coordenadas de los puntos de intersección de la circunferencia x2+y2−4x−2y+1=0 x2+y2−4x−2y+1=0 y la recta x-y+1=0

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497

How do you find the area of a triangle

What is 140% of 25? because i need