3.28 times what give you 9.84

What does independent variable and dependent variable mean in math?

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?

Twice the sum of a number and 2 is equal to three times the difference of the number and 8. find the number.