La grafica muestra la relación entre el tiempo en que un autobus recorre las distancias. ¿Cual es la razón de proporcionalidad? a) 120 km/h b) 90 km/h c) 60 km/h d) 40 km/h

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Kelly is a salesperson at a shoe store, where she must sell a pre-set number of pairs of shoes each month. at the end of each work day the number of pairs of shoes that she has left to sell that month is given by the equation s=300-15x , where s is the number of pair of shoes kelly still needs to sell and x is the number of days she has worked that month. what is the meaning of the number 300 in this equation

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?