Ariel wants to find out the most popular theme for spirit week at school. She cannot decide between two methods.

Option 1: She will poll each student who leaves the gym after sports practice.
Option 2: She will randomly poll three students from each first-period class.

Which statement about the methods is true?

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

Kelly is a salesperson at a shoe store, where she must sell a pre-set number of pairs of shoes each month. at the end of each work day the number of pairs of shoes that she has left to sell that month is given by the equation s=300-15x , where s is the number of pair of shoes kelly still needs to sell and x is the number of days she has worked that month. what is the meaning of the number 300 in this equation

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers