Uncontrolled events happening outside longer-duration experimental studies which can have an effect on the dependent variable, may pose a threat to the study’s internal validity that is called

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex

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

5x−4≥12 or 12x+5≤−4 can you with this problem