Cos A = .83 + cos B = .55 what are sin B + Sin A

pls ask

47 - 90 = 43

43 - 180 = x

x = 137

i believe it's a.

i'm not sure on this one, most likely correct.

1. 16.64

a^2+b^2=c^2

pr^2=pq^2+qr^2

pr^2=14^2+ 9^2

pr^2=196+81

pr= sqr root of 277

16.64

2. 11.31

c^2-a^2=b^2

18^2- 14^2=b^2

b^2=324-196

b=sqr root of 126

b=11.31

hope it ! (btw im in connections academy to, good luck! )