exam Maths Puzzle Numerical Ability

Factor completely




x^10y^3 – 4x^9y^2 – 21x^8y

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exam Other Question
An angle measures 5 degrees more than 4 times its complement. Find the measure of the angle. 9/4a=13

or 9 = 13 * 4a

or 9 = 52a

or 9 / 52 = a

2/7=x/3

or (2 /7) * 3 = x

or 6/7 = x


7x/8-1/4+3x/4=1/16+x