exam Maths Puzzle Numerical Ability

Factor trinomials.
2x^2-8x-24
2(x^2-4x-12)
2(x )(-4x )
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exam Other Question

Please can you help me? Amanda has 500 in ten dollar, five dollar, and one dollar bills. There were 100 bills in all, and 20 more five dollar bills than ten dollars bills. How many one-dollar bills did Amanda have? Round to nearest whole number 1)Write an equation of the circle with center (1,-1) if (-1/2,-1) lies on the circle

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2) The slope of any line perpendicular to the line y=-1/3x-4