There are 4 red beads, 8 yellow beads, and 2 pink beads in a container. if 1 bead is picked random from the container, what are the chances that it will be red?

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

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.