Answer: fifty four degrees (54)
Step-by-step explanation: Using the law of sines you'd multiply both sides by b then plug in the known values... sin(B)= 9/11xsin(80degrees). Then, you'd evaluate to find B and after solving you'd reach 54
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#11 and #12 have no solutions, #13 has a solution which is 14
Answer: x=3
Step-by-step explanation: 3x+2=11
-2 -2
3x=9
x=3