Heading towards semester exams, some students face questions like this one. The tutor works this example. Consider the following problem: Sue has $2200 to invest for one year. She has a choice two investments: investment A pays 4%, while investment …
Math: solving a system by substitution: an investment problem Read more »
Tutoring math, I continue to discover new functions on calculators. The tutor gives a brief introduction to the Sharp EL-520W equation solver. Let’s imagine you need to solve the equation 5×2 – x – 6 = 0 The roots …
Calculator usage: The Sharp EL-520W Equation Solver Read more »
Tutoring math 10, you cover slope-point form. It’s usually the most convenient way to find the equation of a line. The tutor gives an example. Slope-point form is probably much more popular among university students than at high school. It’s …
Tutoring high school math, I don’t see this used. However, I did see it at university. The tutor introduces Cramer’s Rule. Consider the following problem, common in high school math: Solve the system. 2x-4y=20 3x+5y=-3 If you know determinants (having …
Math: Solving systems of equations: Cramer’s Rule Read more »
The tutor points out a habit some people don’t realize they have, yet it nickels and dimes them out of marks. It often comes up during tutoring…. Consider the following expression: Of course, we know this expression must equal …
Tutoring high school math, you might help students whose equation solving skills are rusty. The tutor shows a technique students must know…. Equation solving can be like fitness. A student can be good at it, but then get out …
Following up on yesterday’s post, the tutor continues about determinants. Tutoring university math or natural sciences, they come up often. Yesterday’s post covered some basics about determinants including a 2×2 and a 3×3 example. Although it revealed the necessities for …
Tutoring college math, you cover determinants. They are used in calculus, differential equations, and physics – just to name a few contexts. However, they belong to linear algebra. The tutor works a couple of examples. The determinant is a number …
Tutoring high school math, radicals are prominent. The tutor offers an example of simplifying a higher radical. I’ve written a number of articles on simplifying radicals. I won’t encumber this one with a list of the previous ones, but you …
Tutoring math, you often hear the comment that math involves itself in silly pursuits. The tutor gets the point, and apologizes. Sometimes, non-math people will point out that math harbours absurdities. The infinite string of numbers with a finite sum …