Brainliest answer awaits you +30 which system is equivalent to {3x^2 - 4y^2 = 25 {-6x^2 - 2y^2 = 11 a) 3x^2 - 4y^2 = 25 12x^2 + 4y^2 = 22 b) 3x^2 - 4y^2 = 25 -12x^2 + 4y^2 = 22 c) 6x^2 - 8y^2 = 25 -6x^2 - 2y^2 = 11 d) 6x^2 - 8y^2 = 50 -6x^2 - 2y^2 = 11

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected