Answer:
AB =
Each column of AB is written as a linear combination of columns of Matrix A in the explanation below.
Step-by-step explanation:
A =
B=
We need to write each column of AB as a linear combination of the columns of A so we will multiply each column of A with each column element of B to get the column of AB. So,
AB Column 1 = 2 * + 1 + (-1) =
AB Column 2 = (-1) + 2 + (-2) =
AB Column 3 = (0) + (1) + 4 =
Finally, we can combine all three columns of AB to form the 3x3 matrix AB.
AB =
Answer:
x is add one y is divide in half
Step-by-step explanation:
Answer:
3 and 4
Step-by-step explanation:
3 and 4 added up is 7,4 is one number mor than 3
Answer:
21, 9
Step-by-step explanation:
If girls are x, then boys are x + 12
x + x + 12 = 30
2x + 12 = 30
2x = 18
x = 9
There are 9 girls and 21 boys