EXPLANATION
Price of shoes = $5.50
Markup= 40%
Let's call x to the unknown final price.
The markup percentage relationship is given by the following formula:

Replacing terms:

Multiplying both sides by 5.5:

Dividing both sides by 100:

Adding 5.5 to both sides:

Simplifyng the fraction:

Adding numbers:

Switching sides:

Answer: The final price of the shoes in the deparment store is $7.7
Answer:
3
Step-by-step explanation:
The answer would be B) 6x + 2.
5x + 2 + x (simplify)
(5x + x) + 2 (gather like terms)
6x + 2 (simplify).
Simple...
Which line shows the first error in the solution?
Line 3
This said, because...
5x-25=15
It'd be adding not subtracting-->>
5x-25=15-25 (No)
5x-25=15
+25 +25
5x=40 (Yes)
Thus, your answer.