Question

please answer the questions (if possible all) and i will mark you as a BRAINLIST​

Answer 1

Answer:

Step-by-step explanation:

We have,

$\left|\begin{array}{cc}-1&7\\2&4\end{array}\right|$

$=(-1)(4)-(7)(2)$

$=-4-14$

$=-18$

Answer 2

Step-by-step explanation:

$\large\begin{gathered}\left|\begin{array}{cc}-1&7\\2&4\end{array}\right|\end{gathered}$

$\large \sf 4(-1) -7×2$

$\large \sf -4 -14$

$\large \sf -18$