Bài này làm sao vậy mn oiw : y'=(x+y+1)^{2}

Find the volume of the largest rectangular box in the first octant with three faces in the coordinate planes and one vertex in the plane x + 2y + 3z = 15.

If given an equation of a line such as -1/2x+6 how would you create an equation of a line parallel and perpendicula to this line that goes through another point such as (4,10)

Three coins are flipped. what is the probability that there will be at least two tails?