Michelle made a bead necklace that was 12 inches long. The length of the necklace in inches is equal to 2 added to one-eighth the number of beads, b. Solve the equation 1/8b+2=12 to find how many beads Michelle used for her necklace

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 distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4

What are two numbers that add up to -9 and multiply to -10 best answer gets branliest and 100 extra points