Provide the missing information. The function defined by f(x) = x2 - 9 (is/is not) a one-to-one function, whereas g(x) = x2 - 9;x20 (is/is not) a one-to-one function. Please write out "is; is not" for the respective functions and separate your responses with a semicolon.

A20? -foot ladder is placed against a vertical wall of a? building, with the bottom of the ladder standing on level ground 19 feet from the base of the building. how high up the wall does the ladder? reach?

Iwill give brainliest. suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?

Which number line correctly shows 0.8 + 0.3?