rue or False. Justify your answer.(a) Suppose thatAandBarennmatrices that both have linearly independent columns. ThenAandBhave the same reduced echelon form.(b) The nullity of a nonsingular matrix can be nonzero.(c) LetAbe anmnmatrix. The dimension of the column space ofAisnand the dimensionof the row space ism.(d) SupposeAis anmnmatrix such thatAX

A80-foot piece of siding is cut into three pieces so that the second piece is four times four times as long as the first piece and the third piece is five times as long as the first piece. if x represents the length of the first piece, find the lengths of all three pieces.

An incoming airplane is x miles due north from the control tower at an airport. a second incoming airplane is y miles due east of the same control tower. the shortest distance between the two airplanes is z miles. which of the following functions would best model the situation above?

Nour and rana are shopping for a christmas tree. they are deciding between 2 22 different types of trees (real and fake) and 4 44 colors for the ornaments (white, silver, gold, and purple). they each created a display to represent the sample space of randomly picking a type of tree and a color for the ornaments. whose display correctly represents the sample space?