Aprofessor must randomly select 4 students to participate in a mock debate. there are 20 students in his class. in how many different ways can these students be selected, if the number of selections does not matter?

1- identificar select the category that corresponds to each term. january 23 11: 59 pm unlimited attempts remaining grade settings 276-279 vocabulary list modelo fiesta quinceañera casada adolescencia viudo juventud navidad niñez vejez aniversario de bodas divorciado madurez cumpleaños soltera

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?