An online retailer charges $699 plus $0.55 per pound o ship electronics purchases. How many pounds is a DVD player for which the shipping charge is $11.94?
1 Answer
Dec 15, 2016
The answer is approximately
Explanation:

Write a "let" statement:
Let the variable#x# represent the number of pounds of an item. 
Create an equation:
Since it costs#$0.55# /pound, we can use the expression#0.55x# to represent the shipping cost of an item that is#x# pounds. In addition, since you want the total to be#$11.94# , you can set the equation to be:#0.55x = 11.94# 
Solve for
#x# :
In order to do this, we have to isolate#x# . We can do this by dividing each side by#0.55#
#(cancel0.55x)/cancel0.55 = 11.94/0.55" "# the two#0.55# 's cancel out. 
In the end, we are left with roughly
#x = 21.71# , which means that the DVD player is approximately#21.71# pounds.