A professor discovered that the scores on his last exam were positively skewed. What does this indicate about his students' performance on the exam?

Given this information, which expression must represent the value of b?

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?

What is the result of adding the system of equations? 2x+y=4 3x-y=6