Pregunta 9 La expresión 9x? - 80x - 100 representa la utilidad en la producción de una nueva libreta
profesional, ¿para qué valor positivo "x" la utilidad resulta igual a cero?

Several paint mixtures are made by mixing blue paint and white paint. paint colors blue paint white paint mixture a 5 cups 12 cups mixture b 6 cups 6 cups mixture c 4 cups 12 cups mixture d 5 cups 6 cups which mixture has the highest ratio of blue paint to white paint