Which of the following equations have imaginary roots? Select all that apply. AO 22 – 2x + 5 = 0
B. 22 – 2x+1=0
c. 22
2x – 5 = 0
D. 22
2x + 3 = 0
E. 22 – 2x – 1=0
F. 22 – 2x – 3 = 0

Astudent survey asked: "how tall are you (in inches)? " here's the data: 67, 72, 73, 60, 65, 86, 72, 69, 74 give the five number summary. a. median: 73, mean: 70.89, iqr: 5, min: 60, max: 74 b. 60, 66, 72, 73.5, 86 c. 60, 67, 72, 73, 74 d. 0, 60, 70, 89, 74, 100

Use sigma notation to represent the following series for 9 terms.

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.