exam Maths Puzzle Numerical Ability

rewrite the expresion so that all exponents are positive

(-13)^-1

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exam Other Question

Solve.

Suppose that the cost C, in dollars, of producing x items is given by
C= 2x squared - 20x +3500. How many items can be produced for $9500? I have a question of how to minimize this problem...

Minimize w = y1 + y2 + 4y3
subject to : y1 + 2y2 + 3y3 (is greater than or equal to) 115