I know this is easy but I am unsure about how to answer a multivariable-calculus question as a volunteer tutor, I left a couple of students with a method but a lot of others needed help today so I had to move on, I am hoping someone can confirm my method or reveal a correct method.
Question: Find the points of intersection between the parametrized line: $$x = 1 + t$$ $$y = 3 + 2t$$ $$z = 1 + t$$
And the curve: $z = x^2 + 2y^2$
I noticed there are 4 equations and 4 unknowns. So was it correct to tell the students that it appears to be a substitution problem, and by simply plugging in the given values for $x, y, z$, we can solve for $t$. And it appears for $t$ there are two values for, which makes sense if there are two intersections. By plugging in the value of $t$ for the line one can surely find points. I assume the work can also be checked by using the equation of the curve for such points as well to determine they work in the equation of the curve.
I only have taken multivariable last term, so I am still getting comfortable with the idea here and I think I am the only tutor that can do it where I work, so verification is much appreciated.