With geometric sequences, if you divide a term by the term before it you'll get the common ratio. That's how they are all constructed, and in this problem:

So -1/4 is our common ratio.
Answer:
cos A= 5/13
tan A= 12/5
Step-by-step explanation:
Because when two lines intercept, the two opposite angles from the four angles that are created from the intercepted lines are always equal.
Answer:
15% off
Step-by-step explanation:
We know we paid $25.50 of the original $30. We can divide these two numbers
. This is means we paid 85% of the original price. The discount percentage is the remaining percentage from 85 to 100 which is 15. The pants were 15% off.