First you need to get rid of the parenthesis by distributing the 0.6 to each term inside.
(0.6)(10n) + (0.6)(25) =10+5n
6n +15 = 10+5n subtract the 5n on both sides and subtract 15 from both sides
6n-5n = 10-15
n=-5
1. 6a + 2b
2. 9a + 4b
3. 12a + 6b
4. 15a + 8b
5. 18a + 10b
6. 21a + 12b
7. 24a + 14b
8. 27a + 16b
9. 30a + 18b
10. 33a + 20b
11. 36a + 22b
12. 39a + 24b
13. 42a + 26b
14. 45a + 28b
15. 48a + 30b
16. 51a + 32b
17. 54a + 34b
18. 57a + 36b
19. 60a + 38b
20. 63a + 40b
21. 66a + 42b
22. 69a + 44b
23. 71a + 46b
24. 74a + 48b
25. 77a + 50b
26. 80a + 52b
27. 83a + 54b
28. 86a + 56b
29. 89a + 58b
30. 91a + 60b
31. 94a + 62b
32. 97a + 64b
33. 100a + 66b
34. 103a + 68b
35. 109a + 70b
36. 112a + 72b
37. 115a + 74b
38. 118a + 76b
39. 121a + 78b
40. 124a + 80b
Basically, add 3 to every number in front of the a and 2 to every number in front of the b. Or just multiply.
Treat

as the boundary of the region

, where

is the part of the surface

bounded by

. We write

with

.
By Stoke's theorem, the line integral is equivalent to the surface integral over

of the curl of

. We have

so the line integral is equivalent to


where

is a vector-valued function that parameterizes

. In this case, we can take

with

and

. Then

and the integral becomes


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Answer:
x = - 5, x = 4
Step-by-step explanation:
Given
f(x) = x² + x - 20
To find the zeros equate f(x) to zero, that is
x² + x - 20 = 0
Consider the factors of the constant term ( - 20) which sum to give the coefficient of the x- term ( + 1)
The factors are + 5 and - 4, since
5 × - 4 = - 20 and + 5 - 4 = + 1, hence
(x + 5)x - 4) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 5 = 0 ⇒ x = - 5
x - 4 = 0 ⇒ x = 4