18.75÷5=3.75
12.75÷3=4.2
The pack of 5 books has the lower cost per book
F=9/5c+32
-31=9/5c+32
-63=9/5c
-35=c
A^2 - b^2 ...difference of squares
so
9m^4 - 49n^6 = (3n^2)^2 - (7n^3)^2
answer
C. 9m^4 - 49n^6
Bottle 1 = $1.92 & 12 ounces
Bottle 2 = $2.40 & 16 ounces
Bottle 1
If 12 ounces costs $1.92, to determine the price of 1 ounce we divide $1.92 by 12.
$1.92 ÷ 12 = $0.16 per ounce for bottle 1.
Bottle 2
If 16 ounces costs $2.40, to determine the price of 1 ounce we divide $2.40 by 16.
$2.40 ÷ 16 = $0.15 per ounce for bottle 2.
Therefore we can determine that Bottle 2 is cheaper per ounce than Bottle 1.
