Matrix method

Matrix is- 1st row  1  2  -2 2nd row  1. 2. 1 3 row -1 -1 0

If A= (a b) and A-1= ( x y )          ( c d)                 ( z w) Find w,x,y,z in the terms of a,b,c and d.   P/s: I really appreciate if you can help me. Thank you sir/madam/miss. 

If X1,X2 and X3 are vectors in R3 such that {X1,X2} and {X1,X3} are linearly independent sets, then {X1,X2,X3} is a linearly independent set.

               2 1 0                   1 0 1Let A = [ 1 0 1 ] and B = [ 2 0 1 ]                0 3 0                  0 1 1 Find the matrix X such that (2X + A)-1 = B.

If A is a 2 x 2 matrix such that AAT (Transpose) = 0, then A = 0.

Use a matrix method to solve the set of equations x+2y+3=0 and 3x-y-5=0

A dietician works in a hospital and prepares meals under guidance of a physician. suppose for a particular patient, a physician prescribes a meal to have 750 calories, 40 g of protein, and 320 mg... more

1) 3x-2y+z=9     x+y+4z=4    2x+3z=-1       2) x-2y=5z+4    6y+18z=2x-8   -3x+8y+20z=-18         3) -14=-20y-7x      10y+4=2x  

If she made the last free throw, then her probability of making the next one is 0.9. On the other hand, If she missed the last free throw, then her probability of making the next one is 0.2. Assume... more

solve using a matrix    x+2y-3z=-15 2x-3y+4z=18 -3+y+z=1

here is the problem     3x + 4y = 12 2x + y  = 13   i need help step by step in how to solve this problem using matrix 

I am having a very hard time understanding what the term matrix means. I have tried to ask a teacher and I received little help.

solve the simultaneous equation below using any of the matrix method    2x+3y-z=6   3x+y+5z=8     x+2y+z=10

x − 3y − z = 133x + y − 4z = −13−2x + 5y + 3z = −19   x = ? y = ? z = ?   (If the system has infinitely many solutions, express your answer in terms of k, where x = x(k), y = y(k), and z = k.... more

solve the equation by matrix method:- x+2y-3z=4 2x+4y-5z=12 3x-y+z=3