Can someone double check my answer, much appreciated.
x > 3
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If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

Each cookie sells for $0.50 sam spent $90 on baking supplies and each cookie cost $0.25 to make how many cookies does sam need to sell before making a profit formula: sales> cost