The rule is +4
how did you find it you can 87-91=4
so that is your rule +4
Answer:
31
Step-by-step explanation:
Answer:
15
Step-by-step explanation:
30 / 2 = 15
Sum of two sides always greater than the third side
If c is the smallest number, then
5 + c > 7
c > 2
If c is the largest number, then
5+7>c
12>c
Adding c>2 and 12>c, you get 12>c>2 for the answer
