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.
Archives for 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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