PLEASE HELP

Question

FedEx costs $5 for the first pound and 0.30 for additional pounds. Ups cost $7 for the first pound and 0.20 for additional ponds. At what point will they become equal in terms of money and ponds?

Answer 1

Let x = pounds after the first pound = additional pounds

 

Set your equations to be equal.

5 + 0.3x = 7 + 0.2x

 

Isolate x.

5-7 = 0.2x-0.3x

 

Simplify.

-2 = -0.1x

 

Solve for x.

x= -2/-.1

x=20 lbs

 

Plug back in to get price.

$5 + $0.3/lb * 20lb = $5 + $6 = $11

 

 

Remember, x = additional pounds = number of pounds AFTER the first pound (meaning total pounds shipped = x+1 = 21lbs)

 

So, when you ship 21 pounds, you will pay $11 at either place.