Planificar una actividad en la que se pueda medir el ángulo de visión (con dos ojos, con un ojo, mirando a través de un orificio de un papel) con ayuda de cuerdas

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.