If Angelica is 5 steps to the right of the classroom door and Brion is 12 steps to the left how many steps apart are they?

What is the value of x in the following equation? -3x-2=2x+8

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?