exam Maths Puzzle Numerical Ability

find the following product

8x^2(-4x^2+3x-6)

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exam Other Question

If isoceles trapezoid ABCD, leg AB=6y-5 , base BC=10y-4 , and leg CD=4y+7. Find the value of y. Theresa sold three different magazine subscribtions for $28,$18,and $27. She sold three fewer of the $28 subscriptions than of the $18 subscriptions and a total of 34 subscriptions. If her total sales wer $819, how many $27 subscriptions did Theresa sell?