Write the system of equations as an augmented matrix \( \left\{\begin{array}{r}m-9 c-6 r=100 \\ 3 c+2 r=400 \\ -8 c-5 r=150\end{array}\right. \) Add Work

Subtract the polynomials: \( (5x^{3} + 2x^{2} - 7) - (3x^{3} - x^{2} + 4) \)

a. \( \frac{2 x^{3}+6 x-6}{x^{3}-1} \)

Roger was told to think of a number, add 20 , then divide the result by 3 . The answer was Jower than Roger's original number. Deteruine the range of possible numbers Roger may have originally chosen.

Diketahui sistem persamaan tinier berikut ini : \[ \begin{array}{l}-1 x+y+2 z=2 \\ 3 x-1 y+z=6 \\ -1 x+3 y+4 z=4\end{array} \] Tentukan solusi persamaan linear tersebut menggunakan metode gauss!

tinh \( a x^{2}+2 x+3 y=6 \)