TheBraniax TheBraniax
  • 16-11-2018
  • Mathematics
contestada

A plumber charges an initial amount,x, to make a house call plus an hourly rate,y, for the time he is working.A 1-hour job costs $90 and a 3-hour job cost $210

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rainbowangel91585
rainbowangel91585 rainbowangel91585
  • 24-11-2018
x=$30
y=$60

1 hour job- 60x1=60+30=90
3 hour job-60x3=180+30=210
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