Answer:
Step-by-step explanation:
x=2
Answer:
pairs
Step-by-step explanation:
Given
Profit on selling 'x' pairs of shoes is 
Find the derivative of the function to find out the critical points

Thus, for 4 pair of shoes profit is maximize.
6.7
6 7/10
(You can do an infinite amount with fractions)
Six and seven tenths
Answer:
Incorrect
Step-by-step explanation:
We are given the equation:

Add both sides by 9.

When we want to tell if the absolute equation has solutions or not, we have to simplify in this form first: or isolate the absolute sign.

If c ≥ 0, the equation has solutions.
If c < 0, the equation does not have solutions.
Therefore, it does not always matter if the constant on right side is in negative because if there is a number on the left side then there is a chance that the equation has solutions.
From |3x+8| = 4 is equivalent |3x+8|-9=-5 and the right side is 4 which is positive.
Hence, the equation does have a solution!