book Maths Puzzle Numerical Ability

A mixture of 12 liters of chemical A, 16 liters of chemical B, and 26 liters of chemical C is required to kill a destructive crop insect. Commercial spray X contains 1, 2, and 2 pa

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book Other Question

A neighborhood grocer sells a mix of chocolate and carob candy. The chocolate cost $2.70 a pound and the carob costs $2.55 a pound. If 20 pounds of the chocolate and 40 pounds of the carob candy are used, what is the cost per pound of the mixture? Does this parabola open up, down, left or right?

{{{x=-2y^2}}}