Answer:
$55
Step-by-step explanation:
Let b represent the original bill. The problem statement tells us ...
20% × (b -6) = 9.80
Dividing by 20% gives ...
b -6 = 49.00
b = 55.00 . . . . . . . add 6
Their bill before the discount was $55.00.
___
<em>Comment on the tip</em>
It is generally considered better form to tip on the basis of the original bill before coupons and discounts.
Answer:
7/12
Imagine this:
you had a block set with 12 blocks in it
you built a tower with 5 blocks (5/12)
You have 7 blocks left (7/12)
5/12 + 7/12 = 12/12 = 1
If the antique's value increases over time, it must be growing (not decaying) in value.
We're told the value increases by 12.12%, which means that if the current value is

, then the value after 1 year is

. Each year, the value increases by the same factor, which means after 2 years, the value is

; after 3 years, the value is

; and so on.
Here

is the starting value of the antique. So the answer is the second choice.
You would change the denominator and get the lowest common denominator. Thos would be 30. You would do 11/6 x 5/5 = 55/30. Then do 3/5 x 6/6 = 18/30. Then add 55/30 + 18/30 = 73/30 and simplify.
Step-by-step explanation:
it's option D (x³)
hope this helps you.