ACT 2021 April(Z04) Math Question 39 Explanation - ACT Helper

Pricing | Login

2021 April(Z04) Math Question 39
Matrices
- Multiplication
Matrix Multiplying
Choice D
Given that:
$X = [\begin{matrix} - 1 & 0 \end{matrix}]$ $Y = [\begin{matrix} - 2 \\ - 1 \end{matrix}]$
Then,
$X Y = [\begin{matrix} - 1 & 0 \end{matrix}] [\begin{matrix} - 2 \\ - 1 \end{matrix}]$ $= [(- 1) (- 2) + (0) (- 1)]$ $= [2]$
Skills you are tested for:
Was this explanation helpful?
Add your comment
Your mood
Thanks for your feedback! ❤️

Comments

To leave a comment,