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2021 PSAT Wednesday Test: Video explanations posted

December 29, 2021 Leave a Comment

 
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.

Filed Under: PSAT

SAT math practice question: Functions with word translation

December 17, 2021 Leave a Comment

 
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?

  1. $\quad T(n)=2n-2$
  2. $\quad T(n)=2n-1$
  3. $\quad T(n)=2n$
  4. $\quad T(n)=2n+2$

A

Video Explanation

 

Filed Under: SAT Practice Questions

SAT math practice question: Quadratic equations with no solution

November 24, 2021 Leave a Comment

 
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 $k$ ?

  1. $\quad \displaystyle \frac{7}{8}$
  2. $\quad 1$
  3. $\quad \displaystyle \frac{9}{8}$
  4. $\quad \displaystyle \frac{3}{2}$

D

Video Explanation

 

Filed Under: SAT Practice Questions

2021 October SAT QAS Test: Video explanations posted

October 28, 2021 1 Comment

 
Here is the link to the playlist of videos that explain all of the math questions in the 2021 October SAT QAS.

Filed Under: Official SAT Tests

SAT math practice question: Maximum value of a function

September 28, 2021 Leave a Comment

 
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?

  1. $\quad -4$
  2. $\quad -3$
  3. $\quad -2$
  4. $\quad -1$

C

Video Explanation

 

Filed Under: SAT Practice Questions

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