Chapter 6 - Systems of Equations and Inequalities - 6-5 Linear Inequalities - Practice and Problem-Solving Exercises - Page 394: 31

$9x+12y \geq 120$ Please see the graph. Answers may vary, and three possible options are (10, 3), (10, 5), and (10,6).

$9x+12y \geq 120$ Let $x = 10$: $9x+12y \geq 120$ $9*10+12y \geq 120$ $90 + 12y \geq 120$ $90 + 12y-90\geq 120-90$ $12y \geq 30$ $12y/12 \geq 30/12$ $y \geq 2.5$