Anyone wanna be my boy bestie or girl bestie? I’m bored -_-

Complete the statements about the system of linear equation respresented by the tables the equation respented the left table is

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

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)