I Really Need Help With These Algebra Questions. 10 Points To Best Answer.?

29. Identify a31 in the matrix.
http://tinypic.com/r/2m2tgy8/5
A. 31
B. -17
C. -6
D. 10
30.
In May, Marcus bought 48 styrofoam balls and decorated them as toy figurines. In June, he sold 19 figurines. In May, Lin bought 44 styrofoam balls to decorate and in June, she sold 21 figurines. Which matrix represents all of their May purchases and their June sales?

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