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Sladkaya [172]
3 years ago
12

Plz help. Plz plz plz plz

Mathematics
1 answer:
Svet_ta [14]3 years ago
7 0

Answer:

option a is right.........

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Answer:

B. 7.35 inches

Step-by-step explanation:

In the triangle:

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Now we know that:

\angle A+\angle B+\angle C=180^\circ$ (Sum of angles in a \triangle)\\63^\circ+47^\circ+\angle C=180^\circ\\\angle C=180^\circ-(63^\circ+47^\circ)\\\angle C=70^\circ

Using the Law of Sines

\dfrac{a}{\sin A} =\dfrac{c}{\sin C}\\\\\dfrac{a}{\sin 63^\circ} =\dfrac{7.75}{\sin 70^\circ} \\\\a=\dfrac{7.75}{\sin 70^\circ} \times \sin 63^\circ\\\\a=7.35$ inches (to the nearest hundredth of an inch)

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