Answer: C x=-4 and -10
Step-by-step explanation:
The rule of a geometric sequence:
We have:
Find 
substitute:
Answer:
70/3
Step-by-step explanation:
- Multiply: 23*3
- 23*3=69
- Add: 69+1
- 69+1=70
- 70/3
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Answer:
55 maybe?
Step-by-step explanation:
6*7=42
42-1=41
Then
7*8=56
56-1=55
The formula for circumference = 2*Pi*r
R= radius. Radius is half of the diameter, and d= 20. This means that radius = 10. Now we have a full formula to work with.2*Pi*10.
Substitute 3.14 for pi.
3.14 * 10 = 31.4.
31.4*2 = 62.8.
62.8 rounded equals 63.
C = 63.
