Answer:
C.
Step-by-step explanation:
Answer:
b.
Step-by-step explanation:
The quantity x minus 2y is (x - 2y), then we add 3.
<span>On the one hand we know that sin(30) = 1/2. On the other hand we know that sin(A) = a/c. From these two relations we obtain that 1/2 = a/c <=> 1/2 = a/12 <=> a = 12*1/2 <=> a = 6. So the answer is D. 6cm.</span>
