exam Maths Puzzle Numerical Ability

write each fraction in simplest form.

-15x^3y^3/20xy^4

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exam Other Question

The sides of a rectangle have lengths x+9 and widths x-3.Which equation describes the perimeter,P,of the rectangle in terms of x?
a.P=x^2 +6x-27
b.P=4x+12
c.P=x^2+12x-27
d.P=2x+6 Could someone please help me with the following problem:

carry out the following arithmetic operation for the following complex number (27-j6)/(2-j3) thanks