Justify whether the following subsets are subspaces of R 2×2 or not: • (1 point) The subset S, consisting of matrices with the entry a12 = 1. • (2 points) Fix a matrix A in R 2×2 . Define the subset S := {B ∈ R 2×2 : AB = O} where O is the zero matrix.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.

Witch sequence shows a pattern where each term is 1.5 times the previous term