The width of a high school soccer field is 45 yards shorter than its length. a) define a variable, and write an expression for the area of the field. b) the area of the field is 9000 square yards. find the dimensions

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Answer: the correct answer is 10step-by-step explanation: let the number be n, then the expression becomes,then“twelve more than the quotient of a number and two, decreased by four” iswhen n=4,we substitute 4 whetever we see n to get,we simplify to obtain,we further simplify to get,therefore the correct answer is c.