exam Maths Puzzle Numerical Ability

4w-1(3w+6)-w-1(3)=w-1(w+2)

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exam Other Question

A company just starting business made the following four inventory purchases in June:
June 1 150 units $ 780
June 10 200 units 1,170
June 15 200 units 1,260
June 28 150 u 20. Ken has worked at the same company for many years. The function A(t) gives his annual salary A at any time t, where t is the number of years after 1980.
a. Ken's friend Gabrie