Math 240 Problem Set 4 Matrices Objectives: Identify the dimensions of a matrix Add and scale matrices . Perform matrix-vector multiplication Rewrite a system of equations as a matrix equation and vice versa Problem 1: Give an example 4-by-2 matrix. (There are many correct answers.) Problem 2: Let A = 3 6 1]. B = [ 2 3 72] a. Evaluate A + B b. Evaluate -10AProblem 3: Explain why each set of vectors is linearly dependent. backs