Answer:

Step-by-step explanation:
<u>Step 1: Distribute the plus</u>
<u />

<u>Step 2: Combine like terms</u>
<u />



Answer: 
9% decrease because 145-132=13
13=9% of 145
Answer:
A. -61/9
Step-by-step explanation:
(7x + 28) + (7x +28) = 5x - 5 . . . . . . . given equation
14x +56 = 5x -5 . . . . . . . . . . . . . . . . . collect terms
9x = -61 . . . . . . . . . . . . . . . . . . . . . . . . subtract 5x+56
x = -61/9 . . . . . . . . . . . . . . . . . . . . . . . . divide by the coefficient of x
Given:
The revenue function is

The cost function is

To find:
The profit function.
Solution:
We know that, the total profit P is defined as total revenue R minus total cost C.
So, the profit function is




Therefore, the profit function is
.
Answer:
1~30
2~3
3~40
4~70
5~90
6~90
7~80
Step-by-step explanation:
subtract the total revenue from the total cost