?

SAT® Subject Test in Math 1 & 2

Free Version

Upgrade subject to access all content

Easy

Adding Matrices

Free
SATSTM-EPMYV9

What does the value of $z$ have to be in order to make the following equation true?

$$3\begin{bmatrix}2&-5\\\ 4&-7\end{bmatrix}=\begin{bmatrix}8&4\\\ 12&-9\end{bmatrix}+\begin{bmatrix}-2&-19\\\ 0&2z\end{bmatrix}$$

A

$6$

B

$1$

C

$3$

D

$-1$

E

$-6$