Cookies are on sale! today each cookie costs $0.75 less than the normal price. right now if you buy 7 of them it will only cost you$2.80 write an equation to determine the normal price of each cookie.

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?