please hlp solve this problems

Express the column matrix b as a linear combination of the columns of A. (Use A1, A2, and A3 respectively for the columns of A.) 1 6 10 A = 0 b = 9 O b = Need Help? Read It Talk to a TutorWrite the system of linear equations in the form Ax = b and solve this matrix equation for x. x1 - 5X2 + 2X3 = 4 -3X1 + X2 - X3 = -8 -2x2 + 5X3 = -8 X1 4 X2 -8 X3 8 X1 X2 E X3 Need Help? Read It Talk to a TutorConsider the following matrix. A = 1 k 3 4 5 1 Assume that the matrix is the augmented matrix of a system of linear equations. {a} Determine the number of equations and the number of variables. equations variables {b} Find the value(s) of k such that the svstem is consistent. 5 lle= 4 5 walk: ' 4 r). all real it at E 5 r\". all real it at ' 4 r\". all real it Assume that the matrix is the coei'cient matrix of a homogeneous system of linear equations. {a} Determine the number of equations and the number of variables. equations variables {b} Find the value(s) of k such that the svstem is consistent. Il k: i - 4 5 Il k: ' 4 5 r\". H Ik :5 _ a rea 4 n all real it :E i 4 If: all real it