Choose which of the following functions has a domain of all real numbers. select all that apply. a.) y = x b.) y = 2x2 + x - 3 c.) y = 3x - 4 d.) y = 2 e.) y = 3 - x2

Domain is the set of x values in which the graph of a function exists. If the domain is all real numbers; that means there are no gaps in the graph. The only time the domain is not ARN is when there is a square root, denominator, or log/ln. Anything under a square root must be positive. The denominator cannot be equal to zero. A log function must be strictly positive. Therefore all of the equations listed above apply.

One unique triangle, because those angles add up to 180, and that's how many degrees there are in one triangle.