(-y + 5.3) + (7.2y - 9) = 6.2y +n whats the value of n?

This is different from the first one can someone me

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)

According to the data set, where should the upper quartile line of the box plot be placed?