exam Maths Puzzle Numerical Ability

Find the quotient: x^4 - 5x^3/7x^3

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Subject: Ratios and Areas of similar figures Question: Two regular heptaons have areas of 7 sq in and 63 sq in. What is the ratio of their apothems?

Hi thank you for helpi Which mapping rule transfroms the unit circle to a circle having centre(1,-5) and radius4 ?
a)( x,y)--(1/4x-1,1/4y+5)
b)(x,y)--(1/4x+1,1/4y-5)
c)(x,y)--(4x-1,4y+5)
d)(x,y)--(4x+1,4y-5)