The March of Time
1948: NEW YORK CITY: BOOKKEEPER: Unidentified female adding up numbers from ledger on manual adding machine, turning pages in large book above ledger, two men conducting business BG, standing, male gesturing w/ fingers to nose.
MOT 1948: NEW YORK CITY: BOOKKEEPER: Unidentified female adding up numbers from ledger on manual adding machine, turning pages in large book above ledger, two men conducting business BG, standing, male gesturing w/ fingers to nose.
Brian McLogan
Factoring a trinomial using the diamond method
👉Learn how to factor quadratics. A quadratic is an algebraic expression having two as the highest power of its variable(s). To factor an algebraic expression means to break it up into expressions that can be multiplied together to get...
Khan Academy
IIT JEE Complex Numbers (Part 1), Imaginary and Complex Numbers, Precalculus
In this video, a complex number is defined and graphed on the complex plane. Sal also shows how to add, subtract, and multiply two complex numbers. He shows how to divide two complex numbers but runs out of time and continues in the...
Khan Academy
Khan Academy: Adding Fractions Word Problem: Paint
Video explains how to solve a word problem about paint by adding mixed numbers with unlike denominators. [5:46]