Answer:
30
Step-by-step explanation:
180-100=80
80+70=150
180-150=30
7.17 km
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2 = m ≤ −9
3 = p ≥ 5
4 = x < -10
5 = b < -10
6 = n < 5
7 = n < 6
8 = r ≤ 4
9 = x ≥ 9
10 = p ≤ 0
11 = x < 1
12 = a > 24
