# Videos

I make short math videos – about 5 min. Do you want a short answer to your math question in Algebra, Geometry, Trig, Precalculus, Calculus, Physics ….?

Ask your question on the “contact us” page and, if I pick your question, I’ll send you a youtube link to watch the reply and eventually post it to this site.

Current Links include:

Find the line of intersection between two

planes: https://www.youtube.com/watch?v=NE2pPf8dzjc

Find the height of a tower given the angle of elevation from

two points a known distance apart: https://www.youtube.com/watch?v=KGdvqjWCBqQ&fbclid=IwAR0h8tnrBOfTAbm6PShGRqNOYSrlGFzs3SmLcmWrsomUPieQFILvf3ZCcz4

Calculate grade as a percent of total points: https://www.youtube.com/watch?v=Sv7GEPRDPpg

Translate a statement into a linear equation and solve: https://www.youtube.com/watch?v=p7MWBid_d74

Find the circumference of a circle is given the diameter: https://www.youtube.com/watch?v=d_jIN2ryVOw

A linear system of equations word problem: https://www.youtube.com/watch?v=F4vZYoMwPkQ

Given a rectangle’s perimeter and coordinates for two

vertices. Find coords for the other 2 vert: https://www.youtube.com/watch?v=ZPa_HrYT_ow

Word Problem: Define and use a linear function given two

points: https://www.youtube.com/watch?v=eqqCMYzNoKQ

Find the sin of an angle using the ratio opposite over

hypotenuse: https://www.youtube.com/watch?v=W52xmFO-Fl8&t=118s

Horizontal: Magnitude cos Ø & Vertical is magnitude sin

Ø: https://www.youtube.com/watch?v=7ZebWPQDWgI

Find a line that travels through a point and is

perpendicular to a line: https://www.youtube.com/watch?v=7K7aQ1gh9Kc&fbclid=IwAR2GIpT0VsL2YfzUxtn9Y0JE21MbQcARlFM9KMhVOO1p6pYicaITEeIG0DE

Find the magnitude and direction of a net force: https://www.youtube.com/watch?v=McIhd_zDzKY

Find the equation of a hyperbola centered at the origin

given the location of the foci and vertices: https://www.youtube.com/watch?v=G43aFsmkE6g

How to factor a three term quadratic with a leading

coefficient of one: https://www.youtube.com/watch?v=FDcMnotjSas

How to find a plane that is tangent to a surface at a point:

https://www.youtube.com/watch?v=RoXxUEYnVwI

A great method for factoring three term quadratics is the

“Slide and Divide Method”: https://www.youtube.com/watch?v=5ZN9TsLdeRw