This set of ordered pairs is a blank but is not a blank

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

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?

The product of 3 and a number increased by 8 is 31