15w
the answer is 15 w.
add 9+1+5
The independent variable (the one they want) is the # of hours worked, since that determines the price.
All the other answers contain information not included in the problem
Simple, finding markdown, use these two formulas.
Markdown=Original-New
and
Percent Markdown= Markdown Amount/Original*100
So,
Markdown=612-450
M=162
Markdown%= 162/612*100
M%=0.2647*100
M%=26.5 (rounded)
Thus, there was a 26.5% decrease.
42 is the LCD of all the above fractions.
