100 POINTS An expression is shown below:

2x3 + 10x2 − 4x2y − 20xy

Rewrite the expression by factoring out the greatest common factor. (4 points)

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