Cual de las opciones dadas representa la descomposición en fracciones parciales de la expresión: \[ \frac{2 x^{3}-x}{\left(x^{2}+9\right)^{2}} \] Seleccione una: a. Ninguna de las opciones dadas. b. \( \frac{A}{x^{2}+9}+\frac{C X+D}{\left(x^{2}+9\right)^{2}} \) a \( \frac{A x+B}{x^{2}+9}+\frac{C x+D}{\left(x^{2}+9\right)^{2}} \) d \( \frac{A}{x^{2}+9}+\frac{B}{\left(x^{2}+9\right)^{2}} \)

\( 1 \leftarrow \quad \begin{array}{l}\text { A company finds it can produce } 25 \text { heaters for } \$ 6550 \text {, while producing } 30 \text { heaters costs } \$ 7800 \text {. Express the cost, } \\ \text { as a linear function of the number of heaters, } x \text {. Determine the cost to produce } 40 \text { heaters. } \\ \text { Express the cost, } y \text {, as a linear function of the number of heaters, } x \text {. } \\ y=\square \\ \text { (Simplify your answer.) } \\ \text { The cost to produce } 40 \text { heaters is } \$ \square\end{array} \).

Find the slope and \( y \)-intercept of the graph of the equation. \[ y=\frac{2}{5} x-1 \] Slope \( =\square \) (Enter a fully reduced fraction.) The y-intercept is \( \square \). (Simplify your answer. Type an ordered pair.)

1) \( y=3 x^{2}-2 x-1 \)

Solve for \( m \) \[ \begin{array}{l}-8-5 m=-3 m+6 \\ m=\square \\ \text { Submit }\end{array} \]

If \( 10^{\log x}=10^{18} \), what is the value of \( x ? \) (1 point) 18 \( 10^{18} \) -18 \( 10^{-18} \)