Answer:
Number of books = 4480.
Step-by-step explanation:
Given that fixed cost = $45920
Given that variable cost = $11.25 per book
Let number of books = x
then cost equation is given by 11.25x + 45920
Given that selling price of 1 book = $21.50
then selling price is given by 21.50x
Now we need to find about how many books must the publisher produce and sell so that the production costs will equal the money from sales.
So let's set both equal
21.50x = 11.25x + 45920
21.50x - 11.25x = 45920
10.25x = 45920
x = 45920/10.25
x = 4480
Hence number of books = 4480.
f(n) = -6.5n + 14.5
&
f(1) = 8, f(n+1) = f(n) - 6.5
Answer:
B. 
≅ 
Step-by-step explanation:
2(x+9)=7
If you wanted to simplify;
2x+18=7 (Distributive Property)
2x=-11 (Subtraction Property of Equality)
x=-11/2 (Division Property of Equality)
