Question

Plzz answer this question !!!! Urgents exams tomorrow!!!!

Answer 1

Answer:

(b) -16

Step-by-step explanation:

Case 1)

$z=3x-4y$ passes point $(12, 6)$.

Put $x=12, y=6$ in the given equation.

$z=36-24=12$

∴$z=12$

Case 2)

$z=3x-4y$ passes point (0,4).

Put $x=0, y=4$ in the given equation.

∴$z=-16$