A Notebook cost $5.50 plus sales tax after sale tax the notebook is $5.83 what is the sale tax rate?

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2

The table showed price paid per concert ticket on a popular online auction site. what was the average price paid per ticket

Maria heard on the radio that the high temperature that day would be to determine the temperature in degrees celsius, she used the formula , where c is the temperature in degrees celsius and f is the temperature in degrees fahrenheit.