Answer:
z = -4
Step-by-step explanation:
-5/2 = 3z/4 + 1/2
-10 = 3z + 2
-10 - 3z = 2
-3z = 12
12/-3 = -4
z = -4
1/2, because 9/16 is closer to 8/16 which reduces to 1/2. It is not as close to 0/16 (0) or 16/16 (1)
The applicable relation is
... selling price = cost + markup
You have not said what the base is for the markup percentage. If markup is 75% of the cost, then we have
... markup = 0.75×cost
... cost = markup/0.75 = 3237.50/0.75 = 4316.67
Then the selling price is
... selling price = $4316.67 +$3237.50 = $7,554.17
_____
If the markup is 75% of the selling price, then we have
... markup = 0.75×selling price
... selling price = markup/0.75 = $3237.50/0.75 = $4,316.67