Combine like terms to simplify the expression: 9 − 3z + 4 + 6z − 2 =

15 + 9z

11 + 3z

11 + 9z

11 − 3z

15 + 3z

Liesl grew 7/12 of a foot in one year. her little sister grew 1/3 of a foot during that same year. how much more did liesl grow than her little sister did

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?