7 classes to take as a 10th grader

Plzz true or false: a hyphen can indicate that a word has been split up at the end of a line and continues onto the next line.

Find the center and the radius of the circle with the equation: x^-2x+y^2+4y+1=0

Read the excerpt and answer the question. the boards themselves seemed to remain upright not from being nailed together but rather from leaning together, like a house that a child might have constructed from cards. what best describes the figurative language in the sentence above? idiom simile onomatopoeia personification