Point B lies between points A and C on AC. Letx represent the length of segment AB in inches.
Use the segment to complete the statements.
The value of x is
The length of AB in inches is
A
B
с
х
3x
The length of BC in inches is
20 inches

Can someone me out here number 4 plz

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

Which two undefined geometric terms always describe figures with no beginning or end?