Question

Please answer this question
Please it is very urgent

Substitute x = -1 , y = -2 , z = 3 in each expression and find it's value

a) -20x + 4y + 12z

b) -x -y -z ​

Answer 1

Answer:

The correct answer is-

1. 48
2. 0

Step-by-step explanation:

$= 20x + 4y + 12z \\ = - 20( - 1) + 4( - 2) + 12(3) \\ = 20 - 8 + 36 \\ = 20 + 28 \\ = 48$

$= - x - y - z \\ = - ( - 1) - ( - 2) - 3 \\ = 1 + 2 - 3 \\ = 3 - 3 \\ = 0$

Adiós! Hope this helps you.