Answer: 
Step-by-step explanation:
Sine uses the ratio,
so we can plug in the information we know. since there is no current value for the opposite side of angle A, we can just use a variable to replace it.

You can't reduce this any further because there is an unknown variable.
Answer:
A= -1
Step-by-step explanation:
207$ - 15$ = 192$
192$ : 8 = 24$
Answer: Each book costed 24$.
Answer:
i think is sas......i hope im not wrong