13) Valentina earned $635 dollars at her part time job. She plans to purchase a new 55
inch TV for her room. The total amount of

money that she needs to buy the TV is $505.
What percent of the total amount of money
has she saved so far? please answer

Ben wants to play a carnival game that costs $2. in his pocket he has 5 red tickets worth 35 cents each, and 15 blue tickets worth 10 cents each. which of the following systems of inequalities correctly represents the constraints on the variables in this problem? let represent the red tickets and b represent the blue tickets.

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.