Question

2x+3y+z
x=3 y=-1 z=2
the answer is 5 but i got 7?..

Answer 1

2x+3y+z

2(3)+3(-1)+2

6 - 3 + 2

Did you get this far?

Answer 2

ohhh.. i made 2 mistakes i put the a=3 as a negative and for 3(-1) why isnt the 3 a negative?

Answer 3

the 3 is positive, but plugging in y = -1 makes it negative

Answer 4

so it starts positive, but becomes negative

Answer 5

6+(-3)+2 is the same as what jim wrote

Answer 6

ohhhhhhhh omg.. ik that lol... thx tho.

Answer 7

alright, yw

Answer 8

ya lol