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x₁ = 2x₂ = -7

The prevailing wind is the known common direction that the wind blows along a coast, whether that is east, south west etc. it is specific to each specific site. Longshore drift is the movement of sediment...

If a firm has decreasing returns to scale their unit cost will increase as output increases. This is because the firm‘s costs are increasing as they increase their output, so the average (the total cost d...

Meanders form in the lower regions of a river, where the river profile is flatter and the river bed is wide. There are 'ripples' and 'pools' which are shallow and deep parts of the river bed respectively....

An assessment of the impact a product will have on the environment throughout each stage of its life cycle, from the cradle to the grave. Examples of these stages are; raw materials extraction, manufactur...