In the figure below, b is the midpoint of ac, c is the midpoint of ad, and bc = 6. what is the length of ad?

12

24

18

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

How do you determine whether a relationship represented as as graph is linear or nonlinear

Hell . what are the solutions to `10x^2 - 38x - 8 = 0`? is this when i find the factors and use the numbers within the factors to determine the zeros? i hope that made sense lol