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The cost, c, of paper towels, based on the number of rolls, r, is given by this equation.

c=1.29r
What is the unit rate of the cost of the paper towels in dollars per roll?

Enter your answer as a decimal, like this: 42.53

Answer :

[tex]\\ \sf\longmapsto c=1.29r[/tex]

  • cost is 1$

[tex]\\ \sf\longmapsto 1=1.29r[/tex]

[tex]\\ \sf\longmapsto r=\dfrac{1}{1.29}[/tex]

[tex]\\ \sf\longmapsto r=0.7[/tex]

  • Cost of 0.7 rolls is 1

Cost of 1 roll

[tex]\\ \sf\longmapsto \dfrac{1}{0.7}[/tex]

[tex]\\ \sf\longmapsto \dfrac{10}{7}[/tex]

[tex]\\ \sf\longmapsto 1.4\$[/tex]

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