exam Maths Puzzle Numerical Ability

A bakey sells 50 loaves a day of a particular bread at $1.50 a loaf. Research indicates that, for every 10 cents increase in the price, two fewer loaves would be sold. An equation

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exam Other Question
find the inverse of the one-to-one function f(x)=(3sqrtx-6)

a)f^1(x)=x^3+6
b)f^1(x)=x+6
c)f^1(x)=1/x^3+6
d)f^1(x)=x^3+36 I have to completely factor 2abx-14ax-8bx+56x. Can someone help me work this one out.

thanks