The ages of people signed up for piano lessons are listed.

11, 16, 15, 9, 19, 12, 13, 13, 11, 11, 18, 17

what is the mode of the ages?

a.
12

b.
15

c.
13

d.
11

At dinner, 2/5 of the people had fish and 1/3 had chicken. if everyone else had lamb, what fraction of the people had lamb? and if 40 people had lamb , calculate the total number of people at the dinner.

Astudent simplified a rational expression as shown.

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1