Courses
Teacher-curated, self-paced courses. Looking for a guided sequence through a full topic? See Learning Paths.
2 courses
Pairs of Linear Equations
Mathematics · High School (9–10), General · Pairs of Linear Equations, Linear Equations in Two Variables
FreeCh 7 · 2/2
A boat goes with the river and against the river. From two journeys, can we find the speed of the boat and the speed of the river? Yes, with two equations. Here we solve a pair of equations by drawing, by substitution and by elimination.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Linear Equations and Their Graphs
Mathematics · High School (9–10), General · Linear Equations in Two Variables, Straight Lines
FreeCh 7 · 1/2
Two pens and a notebook cost 10 dollars. Which prices are possible? An equation with two unknowns has many answers. In this course we learn to find them, and we draw them all as one straight line.
3Lessons9Problems2Python Labs1Question Set1Mock Test