Question

Help plz i have 30 mins left

Answer 1

The answer to your question is:

Question 4. First option

Question 5 First option

Last question, I think is the third option

Explanation:

Question 4

A = 120°

a = 7

b = 4

sin A / a = sin B / b

sin B = bsin A / a

sin B = 4 sin120/ 7

sin B = 0.49

B = 29.7 °

C = 180 - 120 - 29.7 = 30.3 °

c/ sinC = a/sinA

c = asinC/sinA

c = 7sin30.3/sin120

c = 4.1

Question 5

Law of cosines

cos C = (c² - a² - b²) / 2ab

cos C = (14² - 10² - 11²) / - 2(10)(11)

cos C = -25 / -220

cos C = 0.11

C = 83.5

sinA / a = sinC/c

sinA = asinC/c

sinA = 10 sin 83.5 / 14

sin A = 0.70

A = 45.2

B = 180 - 83.5 - 45.2

B = 51.3°

Last question

I consider is the third option