Math mates i need your help

Determine which of the following polynomials has (x+1) a factor

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Carmen ayer en el mercado compro 3/4 kg de guayabas, 6/8 kg de peras, 1/2 kg de naranjas ¿cuantos kilogramos de fruta compro?

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.