11) Phil is 24 years older than Stanley. Four years ago, he was 7 times as old as Stanley was then. Find their present ages.

: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?