exam Maths Puzzle Numerical Ability

Solve using Cramer's Rule.
x+2y=5
-3x+y=13

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please help

3/5 + 1/3 T=2/5

T=(answer)

Thanks 1. If f(x) = a(x-h) � + k, and a>0, what happens to the graph of f(x) when:
a. a increases? b. a decreases?
c. h increases? d. h decreases?
e. k increases? f. k decreases?