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Mathematics, 18.12.2019 03:31 pyrkest4688

Astate department of public safety added 13x2 + 5x miles of highway to connect cooltown and bragville. it cost the department 3x2 – 9x thousand dollars to complete each mile of interstate. which expression shows the total cost, in thousands of dollars, of creating this highway?

x4 + 12x3 – 45x2

x4 – 45x2

x4 + 15x3 – 48x2

9x4 – 12x3 – 45x2

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