We are told that Belinda has
to spend. In an inequality, we would represent this by saying that the amount she can spend is less than or equal to
Without any extra topping, the cost of a sundae is
We can now rewrite the left-hand side of the inequality.
If we let
represent the number of extra toppings, the product of
and the price per topping,
describes the cost of the extra toppings. Let's specify our inequality.
By solving the inequality for
we can find how many toppings Belinda can get.
The greatest number of toppings Belinda can buy is
Since Belinda can't buy a fraction of a topping, we have to round this integer down to the nearest whole number,