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Question
pregunta 10
3 puntos
a small printing company charges a flat setup fee, f, for each order plus c dollars per printed booklet. last month, a client paid $160 for 5 booklets.
- write an equation that represents this situation. use f for the flat fee, c for the cost per booklet.
- if f=35 and solve for the cost per booklet. c=$
- if the client had paid $190, how would that change the cost, c? c=$
Step 1: Escribir la ecuación
El costo total es la tarifa fija más el costo por folleto multiplicado por el número de folletos. Aquí, el costo total es $160, el número de folletos es 5. Entonces la ecuación es $f + 5c = 160$.
Step 2: Resolver para c cuando f = 35
Sustituir f = 35 en la ecuación: $35 + 5c = 160$. Restar 35 de ambos lados: $5c = 160 - 35 = 125$. Dividir por 5: $c = \frac{125}{5} = 25$.
Step 3: Resolver para c cuando el costo total es $190
La nueva ecuación es $f + 5c = 190$. Sustituir f = 35: $35 + 5c = 190$. Restar 35: $5c = 190 - 35 = 155$. Dividir por 5: $c = \frac{155}{5} = 31$.
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- $f + 5c = 160$
- $c = 25$
- $c = 31$