Find [4 5]+[x y]=[7 3]

If 2[3 4 5x]+[1y0 1]=[7 0 10 5] , find x and y .

Find the values of x, y and z from the following equations:(i) [[4, 3],[x,5]]=[[y, z],[1, 5]] (ii) [[x+y,3],[ 5+z, x y]]=[[6, 3],[ 5 ,8]] (iii) [[x+y+z],[ x+z],[ y+z]]=[[9],[ 5],[ 7]]

If x: y = 3:5, find 4x + 5y: 6x + 7y.

Find x and y from the following equations: (i) [{:(,5,2),(,-1,y-1):}]-[{:(,1,x-1),(,2,-3):}] =[{:(,4,7),(,-3,2):}] (ii) [-8,x]+[y-2]=[-3,2]

If x: y = 4:7, find 2x + 5y: 3x + 4y.

Find cov (x, y) for the following data : {:(x,3,4,5,6,7),(y,8,7,6,5,4):}

Find x and y, if : [3x 8] [{:(,1,4),(,3,7):}] -3 [2 -7]=5[3,2y]

If 5x - 4y = 7 and xy =8 , find : 125x^3 - 64y^3 .

Find X and Y , if X+Y=[7 0 2 5] and X-Y=[3 0 0 3] .

Find X and Y if X+Y =[ [7,0], [2,5]] and X-Y = [[3,0],[2,3]]