Atank can hold 30,000 gallons of water. if 500 gallons of water are used each day, write the equation that represents the amount of water in the tank x days after it is full

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

50 people men and women were asked if they watched at least one sport on tv. 20 of the people surveyed are women, but only 9 of them watch at least one sport on tv. 16 of the men watch at least one sport on tv. make a a two-way table and a relative frequency table to represent the data.

Y+ 2/y is it a polynomial in one variable or not? and if so, why?