It's B.
You can think of the action of multiplying matrix <em>A</em> onto any other matrix <em>X</em> as
• preserving the first row of <em>X</em> due to the +1 in the first column of the first row,
• negating the second row of <em>X</em> due to the -1 in the second column of the second row, and
• preserving the third row of <em>X</em> due to the +1 in the third column of the third row.
The answer is a and c
Hope this helps.
Answer:
no solution
Step-by-step explanation:
3x - 11 = 3x - 11
3x - 3x = - 11 + 11
0 = 0
Let Rebecca equal x and Jacob equal 6x.
6x + x = 861
7x = 861
Multiply both sides by the reciprocal of 7 which is 1/7.
(1/7)7x = 861(1/7)
x = 123
Since Rebecca equals x we know that she has 123 cards. If we multiply this answer by 6 we get the number of cards Jacob has.
6(123) = 738
Therefore the final answer is:
Jacob = 738
Rebecca = 123
I hope this helps:)
Please comment if there are any problems.
