Solve a Linear System by Graphing | jensenmath.ca | grade 10

This is the first lesson of the grade 10 math course. Learn how to solve a system of two linear equations by graphing them and finding the point of intersection. To graph the lines, you must rearrange them in to the format y=mx+b and then use the y-intercept and slope to plot points on the line. The next two lessons will go over how to solve using the methods of substitution and elimination.

0:00 - intro
4:46 - example 1a
10:40 - example 1b
14:53 - example 1c
18:56 - example 1d
20:18 - example 1e

[rameshkumarsingh]

Thank you so much, its really very helpful. I'm in 9th grade but I'm watching this because you are an awesome teacher. I understand everything taught by you. Than you so much.

[muoian]

That was great ! Thank you for the notes as well from your site

[hebaalshehmany]

This is a question about you grade 11 trig identities lesson on your website. I'm on quite understanding example 3f) question: 1/1-sinx - 1/1+sinx = 2tanx/cosx
I've worked through the whole thing basically so I have:
Left side: Right side:
(1+sinx) - (1-sinx) =(2sinx/cos^2x)

cos^2x
I'm confused as what to do from here; I'm not sure how the numerator for the left side turns into 2sinx. I've looked at the answers on the website but it shows that the (1-sinx) turns into a (1+sinx) and I'm not sure how.