# SOLUTION: I need your help please........... 1. If the matrices A and B are the same size and A+B=A, then: a. Each element of B is 1. b. Each element of B is 0. c. A-B=A. d. B=I, th

Algebra ->  Algebra  -> College  -> Linear Algebra -> SOLUTION: I need your help please........... 1. If the matrices A and B are the same size and A+B=A, then: a. Each element of B is 1. b. Each element of B is 0. c. A-B=A. d. B=I, th      Log On

 Algebra: Linear Algebra (NOT Linear Equations) Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Linear Algebra Question 2893: I need your help please........... 1. If the matrices A and B are the same size and A+B=A, then: a. Each element of B is 1. b. Each element of B is 0. c. A-B=A. d. B=I, the identity matrix. e. B and C 2. For the matrices C and D below, find the value of the missing element in D that makes the matrix product CD=[10]. C=[10 15 -2 5] D=[2 -3 5]... Answer by khwang(438)   (Show Source): You can put this solution on YOUR website!1. Like regular numbers A+B =A implies B = 0 (zero matrix) 2. Not quuite clear tome. C=[10 15 -2 5] let D=[2 -3 5 x]... Your CD may mean the dot product or CD^t(transpose) = 10*2 + 15*(-3)+ (-2)* 5 + 5 x = 10 = -35 + 5x =10, so x = 9.