3. Daniela ha acquistato una borsa con lo sconto del \( 15 \% \) e ha speso 119 euro. Quanto costava la borsa?

Find the Folliving matrices where \( A=\left[\begin{array}{rr}6 & -7 \\ -4 & 6 \\ -1 & 4\end{array}\right] \) and \( B=\left[\begin{array}{cc}-9 & 8 \\ 3 & 0 \\ -3 & 8\end{array}\right] \) Select the correct chace below O. A. \( 3 A-9 B=\square \) simplify your ansmer O B. This matrix openation is not passt

Which expression is equivalent to \( \frac{3 \sqrt{20}}{\sqrt{54}} \) ?

\( \frac{1}{2}!4 \)

11. 842.121

Find the following matries where \[ A=\left[\begin{array}{cc}6 & -7 \\ -4 & 6 \\ -1 & 4\end{array}\right] \text { and } \] \( B=\left[\begin{array}{cc}-9 & 8 \\ 3 & 0 \\ -3 & 8\end{array}\right] \) Select the correct choice below \( O \) A. A-B \( =\square \) simplify your answer \( O B \). This matrice operation is nit passi