Determine if the expressions are equivalent.

12. 7+7x; 7(x+1/7)

13. 2.5(3+x); 2.5+7.5

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?