book Maths Puzzle Numerical Ability

From two kinds of corn meal, one costing $0.65/kg and the other $0.85/kg, a cattle farmer wishes to make a 100 kilogram mixture costing $0.76/kg. How many kilograms of each kind s

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Find the quadratic equation that has the solutions x=4 and x=-8. Write in the form ____X(squared)+____X+_____=0 Find the area of a fenced yard with a length of 9 yards and width of 5 yards.