Which lengths can be used, directly or indirectly, to calculate the volume of the hexagonal right pyramid? Select three options.

XY and ST
VU and TW
XS and XW
TX and WX
VU and YZ

What is the anwers for 9+2x=5x-3-x

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.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle