Answer:
15
Step-by-step explanation:
.5 * 30 = 15
Answer:
Yes you are correct.
Step-by-step explanation:
Answer:
The formula is:

Step-by-step explanation:
The geometric sequences are those in which the division between the terms
and
of the sequence are equal to a constant common reason called "r"
The geometrics secencias have the following form:

Where
is the first term of the sequence
In this sequence we have the following terms
1.2, 3, 7.5, 18.75
Then notice that:

Then:
and 
Finally the formula is:

The answer is 1.
Im too lazy to show the work, but heres how I checked
-7(1 + 2) = -14 - 7
-7 + (-14) = -14 - 7
-21 = -21