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Posted by on Wednesday, November 19, 2008 at 4:38pm.

Kris is starting a delivery business in Ottawa called Kris' Speedy Express. He charges $5, plus $1.50/kg to deliver a package throughout all of Ottawa including all outside communities. His competition, John's Same Day Deliveries charges $6 per delivery plus $1.00/kg. When is it less expensive to use John's Same Day Deliveries?

Can someone help me with the starting equations?

  • Math - , Wednesday, November 19, 2008 at 5:13pm

    Kris: y = 1.5k + 5
    John: y = 1k + 6

    solve 1.5k+5 = k+6

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