Final answer:
AAA Packages Plus and United Packages charge the same amount when the package weight is 30 ounces.
Step-by-step explanation:
To find the weight at which AAA Packages Plus and United Packages charge the same amount, we can set up an equation. Let x represent the weight in ounces:
AAA Packages Plus: Cost = $5 + $0.25x
United Packages: Cost = $2 + $0.35x
Setting the two costs equal to each other, we have:
$5 + $0.25x = $2 + $0.35x
Now, we can solve for x:
$5 - $2 = $0.35x - $0.25x
$3 = $0.1x
x = 30
Therefore, the two companies charge the same amount when the package weight is 30 ounces.