Answer:
? = 20 feet
Explanation:
4 + 4 = 8
8 + 4 = 12
12 + 4 = 16
16 + 4 = ?
3 + 3 = 6
6 + 3 = 9
9 + 3 = 12
12 + 3 = 15
(?, 15)
(20, 15)
4.5m questions
5.7m answers