90% of people inside the grocery store were wearing their face masks properly. 54 people were wearing their masks properly. How many people were in the grocery store?

The vertices of a rectangle are given in the columns of the matrix . if is found to perform a transformation, what are the coordinates of the transformed rectangle? (0, 0), (0, –3), (–3, –3), (–3, 0) (0, 0), (0, 3), (3, 3), (3, 0) (0, 0), (0, 3), (–3, –3), (–3, 0) (0, 0), (0, 3), (–3, 3), (–3, 0)

Which of the following points is collinear with (-2,1) and (0,3)

What is the missing step in this proof ?