Lashonda just put 3.5 liters of fuel into her go-kart. Now, the go-kart has 5.25 liters of fuel. (a) Let \( A \) be the amount of fuel the go-kart had to begin with (in liters). Write an equation that can be used to find \( A \). First choose an appropriate form. Then fill in the blanks with the letter \( A \) and the numbers 3.5 and 5.25 . \( \square \square \square \) \( \square \)

7 Realizar el siguiente sistema de ecuaciones por Método de eliminación (suma ylo Resta) \( \begin{array}{l}4 x+2 y=-2 \\ 3 x+5 y=9\end{array} \)

23. \( x^{3}-3 x=-1 \) olarsa, \( x^{2}+\frac{1}{x^{2}} \) ifadəsinin qiymatini tapın.

4. \( \log _{4} x^{2}-2 \log _{4} x-3=0 \)

Diketahui matriks \( M=\left[\begin{array}{ccc}3 & 0 & -2 \\ -5 & 2 & 0 \\ 0 & -3 & 4\end{array}\right] \) dan \( N=\left[\begin{array}{ccc}0 & 7 & 5 \\ 5 & -3 & 2 \\ 0 & -4 & -3\end{array}\right] \) adalah matriks berordc 3x3. Jika \( \mathrm{M}+\mathrm{N} \), maka tentukanlah hasil dari penjumlahan kedua matriks tersebut !

\( 3 a ^ { 2 } + 3 a c + 4 a b + 2 b c \)