kindly answerr all mcqes no need to show wrking just give exact option

Which of the following can be a solution of the following linear system ? -2x-4y=0 -12x - 24y = 0 None of them No solution O X=8. y=4 O x =-8. y=4 O x =- 8. y -5 Which of the following is always true for the matrices A and B having the same size as 3 x 3? O If B is in REF of A, then det(A)=det( B) O If det(A)= -2. then det(2A)=16 O If det ( )=#0 then Bx=0 has only trivial so O None of them O If A is in RREF form of B. then det(A)=d Which of the following is the answer of det (A -1 . B4) if A and B are 2 x 2 matrices such that det (A) = -4 and det (B) = 2 ? -64 4 0 0 0 0 0 64 4 None of them