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To find -5A + 4B, we need to subtract 5 times matrix A from 4 times matrix B.
First, let's find -5A:
-5A = -5 * A
= -5 * [6 1; -4 -6; 7 -7]
= [-30 -5; 20 30; -35 35]
Next, let's find 4B:
4B = 4 * B
= 4 * [-5 -1; -3 -8; 6 8]
= [-20 -4; -12 -32; 24 32]
Now, let's add -5A and 4B:
-5A + 4B = [-30 -5; 20 30; -35 35] + [-20 -4; -12 -32; 24 32]
= [-30 -5; 20 30; -35 35] + [-20 -4; -12 -32; 24 32]
= [-50 -9; 8 -2; -11 67]
So, -5A + 4B is the matrix:
[-50 -9;
8 -2;
-11 67]
Find –5A + 4B
matrices
A equals
start 3 by 2 matrix
1st row
1st column 6
2nd column 1
2nd row
1st column negative 4
2nd column negative 6
3rd row
1st column 7
2nd column negative 7
end matrix
B equals
start 3 by 2 matrix
1st row
1st column negative 5
2nd column negative 1
2nd row
1st column negative 3
2nd column negative 8
3rd row
1st column 6
2nd column 8
end matrix
(1 point)
Responses
matrix
Image with alt text: matrix
matrix
Image with alt text: matrix
matrix
Image with alt text: matrix
matrix
1 answer