Your starting point is 10 because 3 times 10 is 30 but then find how much you would need along with the .75 per box hint: .75+.75=1.50
Divide 18 by 2 you get 9
then 1cm= 9miles
so 3cm= 27miles
Example????????????????????
ANSWER
50 food items
EXPLANATION
Tanya does not want to spend more than $250
The ticket costs $50 and each food item costs $4.
Let the number of items that can be bought be x.
So, the inequality that represents this situation is:

Now, let us solve it:

Tanya can buy not more than 50 items.
Answer:
The surface area of the triangular prism is = 94.641016151378 cm^2