¿Qué propiedad justifica que 4+ [6 + (-2)] = [4 +6] +(-2)?​

The table shows the number of students who signed up for different after school activities. activity students cooking 9 chess 4 photography 8 robotics 11 select the true statements about the information in the table.

Which equation is represented by the graph below?

From a group of 10 men and 8 women, 5 people are to be selected for a committee so that at least 4 men are on the committee. howmany ways can it be done?