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1. Identify the lines that are perpendicular. y=6, y=1/5x+2, x=5, and y+3=-5(x+4).? How to solve this question? I just don't need answer and need to understand this. Explanation is highly appreciated.? When different kinds of paper with different masses are dropped, is the acceleration going to change or not ? Please help with this thermodynamic/ biology problem! im not sure how to find A or B? If someone is paid $75 in one week, how much money are they making in one hour?