exam Maths Puzzle Numerical Ability

roise's palm pirates, a manufacturer of electronic organizers, estimates that when x hundred palm pirates are made, the averages cost per unit is given by C(x)=0.4x^2-3.69x+9.524,

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exam Other Question

If 3x=y and y=12. Then what is x? A-8 On an oblique triangle b= 19.3 m., c= 28.7m, A=57 degrees. I know the answeres are a=24.3 m, B== 41.7 degrees, C=81.3 degrees but I cannot figure out for four days how to come