Answer:
I think its 15 + 5x
Step-by-step explanation:
Answer:
12.75
Step-by-step explanation:
c = π x d
40.035= 3.14 x d
40.035/3.14 = 12.75
Answer: 
I suppose 17x^ means 17x².
and that we must solve the equation.
Step-by-step explanation:

1. a
2. 8
3. b
4. -2
5. c
6. d , not sure if this is right couldn’t see it properly
7. a
8. a
9. d
10. d
Answer:
11.581 years
Step-by-step explanation:
Formula:
