exam Maths Puzzle Numerical Ability

Simplify: -3x^0 + (1/2)^-2 - (-2)^3

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exam Other Question

The four Baldwin Brothers have a total age of 136 and their ages are represented by consecutive odd intergers. What are the ages of all four brothers? I need help finding the vertex of the parabola

f(x)=-x2+3x-1