exam Maths Puzzle Numerical Ability

please factor completely
x^2+10x+21

and
x^2-8x+16

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exam Other Question

Walt made an extra $9000.00 lst year from his part time job. He invested part of the money at 9% and the rest at 8%. He made a total of $770.00 in interest. How much was invested at 8%? Please help

The quotient of x minus two divided by four plus twelve equals fourteen