exam Maths Puzzle Numerical Ability

Solve the system using any algebraic method:
7x+5y=-12
3x-4y=1

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exam Other Question

Four exponential functions of the form y=a(b)^x presented in the table below.Which function has the largest "b" value ?
x f g h k
1 1.5 3 4.5 3.5
2 2.25 4.5 6.75 7 I think f??? Find the number that is (1/3) of the way from 2(2/3) to 6(1/3).