Amy earned $25 after babysitting for 3 hours. if she always charges the same rate ,how much will she make after working for 7 hours ?

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?