Answer:
16
Step-by-step explanation:
Answer:
The reasonings I provided are just examples (they are true, though!). Hope this helps!
A:b = 8:5 b:c = 3:4
since both sides have b. make b the same. multiply the left by the right side b value of 3 and multiply the right by the left side b value of 5.
3(a:b) and 5(b:c)
3 (8:5) and 5(3:4)
24:15 15:20
now that both sides have the same b value
a:b:c = 24:15:20
Answer:
C. m < A = 152.5 degrees.
Step-by-step explanation:
Use the Cosine Rule:
a^2 = b^2 + c^2 - 2.b.c.cos A
34^2 = 18^2 + 17^2 - 2.18.17 cos A
2.18.17 cos A = 18^2 + 17^2 - 34^2
cos A = (18^2 + 17^2 - 34^2) / (2.18.17)
cos A = -0.88725
m < A = 152.5 degrees.
