Use the sine rule to calculate BC :)
2 answers:
Answer:
BC≈12.2
Step-by-step explanation:
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Answer:
BC≈12.2
Step-by-step explanation:
As we know
24/sin(100°)=BC/sin(30°)
BC=sin(30°)×24/sin(100°)
BC=1/2×24/sin(100°)
BC=12/sin(100°)
BC=12.2 (approximately)
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Answer:
-9 + 7√5.
Step-by-step explanation:
(3 - √5)(2 + 3√5)
= 3(2 + 3√5) - √5(2 + 3√5))
= 6 + 9√5 - 2√5 - 15
= -9 + 7√5.
Step-by-step explanation:
y+80+70=180
y+150=180
y=30
Now you can, easily find x
Simple count by 2's to tens
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