Cuatro personas entran en un ascensor, sus pesos son 56,45kg, 80,453kg, 78,30kg y la última pesaba 132, 249kg porque llevaba consigo una maleta muy pesada. ¿Cuál fue el peso total dentro del ascensor, si la maleta pesaba 42, 891 kg, pero la tuvieron que bajar?

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

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.