Pregunta:
hayley cortó una cuerda de 10 2/3 pies de largo en partes más pequeñas de 8/9 de pie cada una. cuantos pedazos de cuerda cortó?

esta es una pregunta de matemáticas y yo soy pésima para las matemáticas así que necesito un poco de ayuda en esta así que muchas gracias a todos los que me ayuden..

Muscles, a membership-only gym is hoping to open a new branch in a small city in pennsylvania that currently has no fitness centers. according to their research approximately 12,600 residents live within driving distance of the gym. muscles sends out surveys to a sample of 300 randomly selected residents in this area (all of who respond) and finds that 40 residents say they would visit a gym if one was located in their area. based on the past survey research, muscles estimates that approximately 30% of these respondents would actually join the gym if they opened one in the area. based on this information and the results of the sample survey, about how many residents should muscles expect to join its new branch? a) 134 b) 504 c) 1,680 d) 3,780

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?