11. 13 9 15 7 17 5 a, 17 b. 19 c, 15 d.18 e. 21 12.3 2 4 3 9 8 ? a. 22 b. 17c.7d. 64e. 24 13. x t w r up r ? a. l b. nc. pd. me. o 14. wu pr mk fh ? a. db b. bdc. cad. ac e. da 15. 31 17 34 22 44 34 68? a, 58 b, 136 c. 544 d.272 e. 60

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Write a corresponding real world problem to represent 2x - 125=400

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old