I need help please Answer if expert and answer if you arent

Step-by-step explanation:

12a) P = 5x + 2y

12b) P = 5(3) + 2(5) = 25 m

12c) 32 = 5x + 2y

              if x = 1, then y = 13.5 NOPE  y not a whole number

              if x = 2, then y = 11 could work

              if x = 3, then y = 8.5 NOPE  y not a whole number

              if x = 4, then y = 5 could work

              if x = 5, then y = 3.5 NOPE  y not a whole number and is less than x

the graph on the bottom right