A.
Because in mathematics, a geometric progression, also known as a geometric sequence, is a sequence of non-zero numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio.
Answer: 7.8
Step-by-step explanation:
Answer:

Step-by-step explanation:

If you want to solve this easily, you can just remove x and add 30x + 60x.

We know that 30 + 60 is 90. So we will add x to 90.

Now you have your answer!
Hope this helps!
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