The answer is c. Because 4.5 * 2 is 9 then you add 0.5 so the answer is 9.5
-5/16 + 18/16
13/16 - answer
Answer:

Step-by-step explanation:
The first step to solving this problem is verifying if this sequence is an arithmetic sequence or a geometric sequence.
This sequence is arithmetic if:

We have that:




This is not an arithmetic sequence.
This sequence is geometric if:




This is a geometric sequence, in which:
The first term is 40, so 
The common ratio is
, so
.
We have that:

The 10th term is
. So:



Simplifying by 4, we have:

I think you do multiplying fractions. So 1 1/2 x 20