exam Maths Puzzle Numerical Ability

what is the difference between the commutative and the associative properties

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exam Other Question

Write a solutionset for y=3abs(7-2x)+5 when y<8. Landscaping: at an excavation site a conical pile of earth 9 ft high and 14 ft in diameter at the base must be hauled away by a small truck with a capacity of 2.6 cu yd. How many truckloads will it take to transport the soil? Be careful with units.