exam Maths Puzzle Numerical Ability

smith has 3 times as much money invested at 8% bonds as he has in stocks paying 9.5%. how much does he have invested in each if his yearly income from the investments is $6365 ?

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exam Other Question

1)What is the inverse element of 7 under the binary operation "x" defined on the set of real numbers.
2) The binary operation * is defined on the set {0,1,2,3} as a*b=a^2-b^2+ab. Plot y = 2x - 3
Plot y = -x + 3

Estimate the point of intersection.

A(2,1)