I just published the playlist of videos that explain all of the math questions in the 2021 PSAT Wednesday Test that was administered on 13th October 2021.
SAT math practice question: Functions with word translation
Try the following SAT math practice question (No Calculator) that tests your understanding of translating word problems and to create relationships using functions.
Question(No Calculator):
The toll for a vehicle to cross a certain bridge is a total of $\$2$ for the first two passengers plus $\$2$ for each additional passenger. Which of the following functions gives the toll $T(n)$, in dollars, for a vehicle with $n$ passengers?
- $\quad T(n)=2n-2$
- $\quad T(n)=2n-1$
- $\quad T(n)=2n$
- $\quad T(n)=2n+2$
SAT math practice question: Quadratic equations with no solution
Try the following SAT math practice question (Calculator Permitted) that tests your understanding of quadratic equations that have no solutions.
Question(Calculator Permitted):
The quadratic equation $2x^2 – 3x + k=0$, where $k$ is a constant, will have no real solutions for which of the following values of $k$ ?
- $\quad \displaystyle \frac{7}{8}$
- $\quad 1$
- $\quad \displaystyle \frac{9}{8}$
- $\quad \displaystyle \frac{3}{2}$
2021 October SAT QAS Test: Video explanations posted
Here is the link to the playlist of videos that explain all of the math questions in the 2021 October SAT QAS.
SAT math practice question: Maximum value of a function
Try the following SAT math practice question (No Calculator) that tests your understanding of how to find the maximum value of quadratic functions.
Question(No Calculator):
$$ f(x) = -3(x+2)^2 -4 $$
For the function $f$ given above, at what value of $x$ does the maximum value of function $f(x)$ occur?
- $\quad -4$
- $\quad -3$
- $\quad -2$
- $\quad -1$
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