The unit rate of 55 and 8

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin

Which expression is not a polynomial?