Now, on to the subject of complex numbers. We have stayed away from this subject until now simply because we did not want to confuse things. Initially, it is easy to think of signals as “real valued.” ...

Students across the country struggled with advanced algebra on a first-of-its-kind test in that subject, according to a report to be released this week by Achieve, the nonprofit Washington ...

If a student’s transcript shows the successful completion of Algebra 2, what does that really mean? Although a lot more students today are completing the course, a new analysis suggests that line on ...