Determine the direction that this parabola opens y=x^2+2x+8up or down

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have 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

Can you me find the missing length. i attached an image.