Marilyn's cell phone company charges $35 a month for phone service plus $0.50 for each text message. How many text messages does Marilyn send in a month if her bill was $52

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Which one ? is the answer and how to find this answer

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?