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3 years ago

13

Help with 7 and 8 and explain

1 answer:

Tems11 [23]3 years ago

5 0

Answer:

7. $44^{\circ}$

8.

Step-by-step explanation:

7. Using Cosine Rule

$a^2=c^2 +c^2+bcCos(a)$

=> $a^2=20^2+15^2-2*20*15Cos(68^o)$

$a^2=400.24$

$a=20.00$

=>Using Sine Rule

$20/Sin 68^o=15/sinB$

$ABC=44^o$

8

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Answer:

A, D , and E

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We have that:

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Option B

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Option C

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Option D

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This is true

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