The formula of a slope:

We have m = -2 and the points (0, d) and (-8, 9). Substitute:

318-47= 271 There are 271 non-fiction books in the library. just subtract 47 from 318 to get the answer.
Answer:
Step-by-step explanation:
2)
x + 14
= -0.87
x +
= - 
x +
= - 
x = -
-
x = - 
3)
x -8
= 1.5
x -
= 
x =
+ 
x = 
x = 
4)
x -
= - 7 
x -
= - 
x = -
+
x = - 
5)
- x = 6 
=
+ x
-
= x
-
= x
x = - 
6)
-33.754 - x = 28.05
-33.754 - 28.05 = x
- 61.804 = x
x = - 61.804
Answer:
Hopefully, the problem is worded as follows:
a after 3 years = A (1.08)^3 = 1.2597 A after 3 years (invested at end of year)
a after 2 years = A (1.08)^2 = 1.1664 A after 2 years
a after 1 year = A (1.08) = 1.08 A
a last year = A
adding the columns
4 a = 4.5061 A where A is the amount invested each year and a is the total worth of such an investment
or a = 1.12653 A
A = a / 1.12653 = 550,000 / 1.12653 = 488,226 for the total investment
Each year 488,226 / 4 must be invested = 122,057