What is the percent change from 15 to 16?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

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?

Based on the diagrams, what is the value of x?