Answer:
a. w = weight (lbs)
b. cost = 1.45w + 3.25
c. w = 4 lbs
Step-by-step explanation:
we can say that variable w stands for the weight of the package (in pounds).
using this, we know that the cost to ship a package is going to be equal to $1.45 per pound or 1.45w, but we can't forget about the service fee. the service fee doesn't change, so we just add that to our equation to get
cost = 1.45w + 3.25
lastly, we can solve
[tex]($9.05) = 1.45w + 3.25[/tex]
(isolate w by subtracting 3.25 from both sides)
[tex]9.05 - 3.25 = 1.45w[/tex]
[tex]5.8 = 1.45w[/tex]
(divide both sides by 1.45 to get w by itself)
[tex]\frac{5.8}{1.45} = \frac{1.45w}{1.45}[/tex]
(evaluate)
[tex]w = 4[/tex]
(don't forget units)
w = 4 lbs
hope this helps :)
