Answer:
$1600
Step-by-step explanation:
The $800 that the customer paid is 50% of the retail price, so the retail price is twice that amount:
$800/0.50 = $1600
The selling price of the mattress before the discount was $1600.
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Additional comment
The wholesale price was $1600/2.25 = $711.11
right 3 units down 5 units

right 3 units = (3,0)
down 5 units = (0,-5)
vertex = (h,k) therefore.

Then convert the vertex form into standard form for the equation in the choice.

Thus, the answer is B.
1st you combine like terms so subtract 7y and 3y and you get 4y. So this is the final answer: 4y+4b.
<h3>
Answer: 10%</h3>
Work Shown:
2/20 = 0.10 = 10%
Note that 10% of 20 = 0.10*20 = 2 dollars is the sales tax to help confirm the answer.