Two friend went to a restaurant and ordered one plain pizza and two sodas. their bill totaled $15.95 .later that day ,five friends went to the same restaurant .they ordered three plain pizzas and each person had one soda .their bill totaled $45.90 .write and solve a system of equations to determine the price of one plain pizza

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?