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

Question

anonymous · Answer

This is an easy question on proportion.
3 notebooks = $1.98
so logically speaking, 10 notebooks should cost more.
Let x be number of notebooks
Let y be cost of notebooks.
   Therefore, y = kx since it is directly proportional.
                   $1.98 = k(3)
                       Find the value of k.
                Now, what is the unknown? ANS: The cost of 10 notebooks
                      y = (value of k ) (10)
                       therefore, the cost of 10 notebooks =...