A student's cost for last semester at her community college was $2800. she spent $420 of that on books. what percent of last semester's college costs was spent on books?

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

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?

Solve 4 ln x=2ln25 a) x=5 b) x=25 c) x=625