Aclothing store reduces the price of an item by 20% if it is not sold after 3 weeks. it reduces the price a further 30% if the item is still unsold after 6 weeks. and, after 7 weeks if the item is unsold, a further 10% reduction is made. a) estimate the price, after 8 weeks, of a coat that had a regular price of $289.50. b) calculate the sale price, including the sales tax.

answer: domain and range mean all possible values of x and y that could be substituted to the inequality. a solution means all possible values that make the inequality statement true. so while the range is still all real numbers, the solution is the shaded area, for which y will always be greater than the line of the function.

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