Answer:
30=15
Step-by-step explanation:
30=40-30+6-4-27
30=10+2-27
40=12-27
30=-15
3, 4, 5
3 ^2 = 9
4 ^2 = 16
5 ^2 = 25
9 + 16 = 25
1 or I
they share an endpoint.