well first we multiply out the brackets so the teachers is 4(3x+5y+2z)+3(x-z) after multiplying out you get the final of 15x+20y-y so straight away tom and chris out as neither have that next we have to work out jennas so we can see if hers is the same so hers is 5(3x+4y+z) so hers is 15x+20y+5z so all 3 are incorrect i hope this helps and i can help more if you dont understand can i get a brainliest for this pls?
