Debra's penny bank is 2/3 full. after she removes 80 pennies, it is 1/2 full. how many pennies can debra's bank hold?

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

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Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes. she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?