A1050 page textbook needs to be typed in x hours. lisa can type 15 pages in an hour and whitney can type 12 pages in the same amount of time. which of the following shows the expression that models this problem?

a: 1050/x = 12/x + 15/x
b: x/12 + x/15= x/1050
c: 15+12= x/1050
d: 27 = 1050/x

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?