Otriplo de um mumero somado a 9 e igual a 30 .qual e esse numero

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 of the following contains a variable?

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.