The sum of the speeds of two trains is 724.8 miles per hour. If the speed of the first train is 9.2 mph faster than that of the second train, find the speeds of each. What is the speed of the first train?
(Type an integer or a decimal.)

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

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.

Which point-slope form equation represents a line that passes through (3,-2) with a slope of -4/5