1. Find -5A + 4B
A=[6, 1, -4, -6, 7, -7] B=[-5, -1, -3, -8, 6, 8]
a. [-10, 9, 8, -2, 16, 67]
b. -10, 9, 8, -2, -59, -68]
c. [-50, -9, -1, 16, -11, -68]
d. [-50, -9, 8, -2, -11, 67]
2. Solve the matrix equation.
2X + 2 [2, -8, -4, 2] =[4, -6, 2, -8]
a. [0, 5, -3, -2]
b. [0, -11, -3, -6]
c. [0, 5, 5, -6]
d. [4, 5, 5, -2]
3. Find the product.
[-5,-2,
-8, -5]
[-5, 7,
-9, -5]
a. [ 25, 18, -35, 10]
b. [43, -25, 85, -31]
c. [40, 45, -56, 25]
d. [43, -25, -31, 85]
4. determine whether the product is defined or undefined. if defined, give the dimensions of the product matrix.
[1, 1, -4, [9, 1, -7]
5, 6, 0]
a. defined; 3 x 3
b. defined; 2 x 1
c. defined; 2 x 3
d. undefined