How to find if two lines are perpendicular?

What is a rational number between 9.5 and 9.7

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.