Answer:
2
Step-by-step explanation:
The answer would be 2 because it reduces to the same system of equations as the original, which I knew since the first equation was the same and if you divide everything in the second by 2, you'll get 3x-y=8. :)
0.144 because the number after 3 is 5 and that rounds the 3 to a 4.
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I believe it would be D) ST ≈ TR