<span>12a^3b + 8a^2b^2 − 20ab^3
</span>12a^3b = 4ab(3a^2)
8a^2b^2 = 4ab(2ab)
20ab^3 = 4ab(5b^2)
GCF = 4ab
12a3b + 8a2b2 − 20ab3 = 4ab(3a^2 + 2ab - 5b^2)
47/5=9.40
9*5=45
47/5= 9 2/5
Answer:
13: 10
21: 20
29: 30
Step-by-step explanation:
B.90 because 90 degrees is above the original angel
