Step-by-step explanation:

Answer:
288
Explanation:
As first term in sequence is 3 so multiplying it by common ratio 5 we get 15, then multiplying 15 by 5 we get 45 and so on the sequence is
<span>3,15,45,225</span>
whose sum is 288
1/2 + 7/2 = 8/2 or 4
Hope this helps
Answer:
X=8
Step-by-step explanation:
2x-6=22
Subtract 6 from 22
2x=16
Divide 16 by 2
X=8