A plumber charges a fixed fee for coming to your house, then charges a fixed amount per hour on top of this. X= the time the job takes in hours. Y = the total cost of the plumber's time in dollars.

Step-by-step explanation:

 This problem expects us to model the equation for the total cost of the services of the plumber given the conditions stated.

Say the fixed amount charged for coming to your house is $10

say the fix amount charged per is $3

and the time spent to do the job is X

Hence the scenario can be modeled as

the equation is similar to the equation of a straight line

2/3x + 7 = 29

step-by-step explanation:

two thirds = 2/3

plus a number = x

at least 29 = 29

there for you should get 2/3x + 7 = 29