Answer:
5/18
Step-by-step explanation:
Let's say the original packaging was 1 lb of packaging for $1.
The cost was $1/lb.
Then the weight went down by 10% and the price went up by 15%.
Now 0.9 lb of packaging cost $1.15.
The new unit cost is $1.15/(0.9 lb)
The difference is
$1.15/(0.9 lb) - $1/lb =
= $1.15/(0.9 lb) - $0.9/(0.9 lb)
= $0.25/(0.9 lb)
=$25/(90 lb) = $5/(18 lb)
The price went up by 5/18.
First, the item goes on sale for 25% discount which means that the price will now be only 75% of the original price.
Case 1: Price = ($80)(0.75) = $60
Then, the item is sold for additional discount of 10% which the new price is only 90% of the supposed price.
Case 2: Price = ($60)(0.90) = $54
Answer: $54
Solving the inequality
we get 
Step-by-step explanation:
Solving the inequality: 
Solving:

Switching sides (converting > then to < than)

Adding 3 on both sides

So, solving the inequality
we get 
Keywords: Solving inequalities
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Answer:
y = 1/5x - 5.
Step-by-step explanation:
Use point-slope form of a straight line:
y - y1 = m(x - x1)
Here m = the gradient = 1/5 and (x1, y1) = (0, -5) so we have:
y - -5 = 1/5(x - 0)
y + 5 = 1/5x
y = 1/5x - 5.