exam Maths Puzzle Numerical Ability

Im trying to combine like terms

(2x squared -x+3) + (x squared +3x+4)

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exam Other Question

Using a financial calculator, input N = 4, I = 8, PV = 0, FV = 1259.71, and PMT = ?
Solve for PMT  $279.56. Therefore, you would have to make 4 payments of $279.56
each to have
Solve by elimination:

2x+3y=21
5x-2y=-14