VERY URGENT PLEASE HELP Carl is deriving the quadratic equation by completing the square. His work at one of the steps is shown.

x+b/na=+- b^2-4ac/na

Carl is not sure what the value of n is. What value of n should Carl use to continue deriving the quadratic equation correctly?

The appalachian trail is a hiking trail that passes through the appalachian mountains. three members of a teen hiking group hiked a section of the trail. the hikers stopped at a rest area and equally shared 3 4 gallon of water. how much water did each person get?

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

What is the value of x enter your answer in the box (3x+50