Evaluate for the following values of x. value of x value of expression -21 27 -36 -48 -69

Classify the following number. −9.070707…

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

What ratio is proportional to 18/21