exam Maths Puzzle Numerical Ability

e=6f, for f Solution is f=

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exam Other Question

3x^2 + 2x^2 - 7

I think the answer is -2x^2

I am trying to Siplifying expressions When x number of units are sold, the price of each unit (in dollars)) is given by p= -x/2+75. Find the unit price when the following quantities are sold: 2,7,9,11.