Answer:
c = 12.
Step-by-step explanation:
Fill in what you know. 28 = 5 + 11 + c. Add 5 and 11 together. 28 = 16 + c. Then subtract 16 from both sides 28 - 16 = 16 - 16 +c. Then the number you have left is your answer.
Answer:
c=12
Step-by-step explanation:
P=a+b+c
28=5+11+c ; combine 5 and 11.
28=16+c ; subtract 16 from each side to get c
28-16=12
