Matriz: 0 1 3 0
1 0 3 0
3 3 8 0
0 0 0 2

Determine uma base para o subespaço definido pelo conjunto solução do sistema linear (A+I4)X=0.
A. {(−3,0,1,0),(−1,1,0,0)}
B. {(−3,0,1,0),(−3,1,0,0)}
C. {(−1,0,1,0),(−1,1,0,0)}
D. {(−1,0,1,0),(−3,1,0,0)}

Eu não entendi nada dessa matéria :'(

Amaple syrup producer records th amount of sap collected from each of his trees. the line plot shows the results for one day. what is the least amount of sap any one tree produced?

How do i do this activity, is appreciated

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?