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A plumber charges a flat fee of $50 plus an additional $20 per hour.

a) Write and equation in slope-intercept form to represent the total cost the plumber will charge

b) How much will it cost for the plumber to work for 4 hours

c) how many hours must the plumber work to obtain $180?

Respuesta :

Answer:

a) cost = 50 + 20x, where x is the number of hours worked for.

plot cost on the y-axis and hours on the x-axis.

b) cost = 50 + 20 x 4 = $130

c) 180 = 50 + 20x

   130 = 20x

   6.5 = x

   additional charges increment every hour, so the plumber must work for 7 hours before they obtain $180.

Step-by-step explanation:

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