Write proportion that can be used to find the cost of 10 notebooks if 3 notebooks cost 1.98$

2 Answer

  • 3 / 1.98 = 10 / x.....3 notebooks to $1.98 = 10 notebooks to $ x
    and now u would just cross multiply and solve for x (the cost of 10 notebooks)
  • Answer:

    The answer is 6.6$

    Step-by-step explanation:

    Firstly, you have to realize that the cost of a notebook is directly proportional to the amount of notebook you want.

    So, the relation is:


    x=total cost of notebooks

    y=amount of notebooks

    [tex]\frac{x}{y} =k[/tex]

    Where k is a constant

    Therefore, the cost of 10 notebooks is:

    Let z=total cost of 10 notebooks

    [tex]\frac{1.98}{3}=\frac{z}{10}\\z=\frac{1.98*10}{3} \\z=6.6\\[/tex]