My teacher provided me with a practice test for an upcoming exam, and he is not

Question

My teacher provided me with a practice test for an upcoming exam, and he is not going to provide us with the answers to it. I did most of the practice test, but I want to be sure I did them right.

I know the picture isn't too clear and it's missing choices C and D so i typed up the problem so you can see the numbers. Thanks. By the way, I got B as the answer for this problem.

19)

4x+2y=46

3x+6y=75

a) 46 2 4     b) 4 2 46     c) 4 3 46   d) 4 2 75

    75 3   6         3 6 75          2 6 75       6 3 46

Explanation / Answer

try this web site http://algebralab.org/lessons/lesson.aspx?file=Algebra_matrix_systems.xml and http://www.google.com/search?hl=en&rlz=1W1GGLL_en&q=system+of+equation+to+a+matrix+calculator&btnG=Search&aq=f&aqi=&aql=&oq=&gs_rfai= This website is really good http://www.wolframalpha.com/input/?i=menu

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