The answer is d.
Two more (+2) than three times (3) the difference between eight and a number (8-n)
5x + 10y + 5z. Distribute the .5 to the number in the parentheses. It basically just cuts the numbers in half.
Hundreds tens and ones 1 and 1 and 8
Cost per one is 5.75/25=0.23
each one costs 23 cents
