At a cafe, the total cost of a pizza includes the cost of a pizza and the cost of tra topping. The cost of a pizza with 4 toppings is \( \$ 10.00 \), and the cost of a pi th only 1 topping is \( \$ 8.50 \).

6) Solve for \( x: \) \( 5 x-3=2 x+12 \) A. \( x=5 \) B. \( x=3 \) C. \( x=4 \) D. \( x=6 \)

4. \( \left(6 x^{4}+8 x^{3}+5-2 x\right)+\left(3 x^{2}-7 x^{3}+8 x\right)= \)

Найдите значение выражения \( (\sqrt{5}-\sqrt{3})(\sqrt{5}+\sqrt{3}) \).

\begin{tabular}{l} Tentukan himpunan penyelesaian dari persumaan kuadrat \\ \( 1.1 x^{2}+7 x-30=0 \) \\ \hline\end{tabular}

Diberikan sebuah matriks D berukuran \( 3 \times 3 \) yaitu : \( \left[\begin{array}{lll}1 & 4 & 0 \\ 2 & 5 & 1 \\ 3 & 6 & 2\end{array}\right] \), maka determinan dari matriks D adalah ...