An angle whose vertex is at the center of a circle is a central angle of that circle a) true b) false

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation. which method should jeremy use?