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Andrei [34K]
4 years ago
12

PLEASE HELP

Mathematics
2 answers:
Temka [501]4 years ago
8 0

AB:BC=3:7\to AB=3x,\ BC=7x\\\\AB+BC=AC\to3x+7x=120\\\\10x=120\ \ \ |:10\\\\x=12\\\\BC=7x\to BC=7(12)=84

svetoff [14.1K]4 years ago
8 0

Answer:

AB= 12 cm, BC= 8 cm

Step-by-step explanation:

A:B= C:B=3:2

AB=3/2 BC

AC = 20 = AB+BC

20 = 3/2 BC+BC

1 3/2 = 20

BC=8

AB= 20-8=12

I know this is the correct answer I've completed it and gotten the right answer

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Answer:

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