exam Maths Puzzle Numerical Ability

Solve each system by the addition method:

x/3 - y/2 = -5/6

x/5 - y/3 = -3/5

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exam Other Question

Points X,Y and Z are collinear, with point X between points Y and Z. If XY =14.8 and YZ= 18.2, find XZ???? A company uses the formula C(x)= 0.02x^2-3.4x + 150 to model the unit cost in dollars for producing x stabilizer bars. For what number of bars is the unit cost at its minimum? What is the unit cost at that level of production?