exam Maths Puzzle Numerical Ability

Evaluate the following expression for a = 6, b = 3 and c = 4.
a � b + 2c

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48. Business and finance. When x number of units are sold, the price of each unit (in P= x 75
dollars) is given by . Find the unit price when the following quantities
are sold: 2, 7, 9, 11. 3x-2y=20
Find the x & y intercept and graph the equation.