Triangle abc is similar to triangle def, ac=9x, bc=8, df=18, and ef=x. which of the following represents the length of ac.

1) 36
2)16
3)8
4)4

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin.how many doctors use brand x aspirin

What is the distance between a and b? round your answer to the nearest tenth. a coordinate plane is shown. point a is located at negative 1, 5, and point b is located at 4, 1. a line segment connects the two points.

Solve for x where 0 equation: cot^2x+2cotx+1=0