\( Y=x+1 \) when \( x=10 \),solve for \( y \)

Find the equation of the line with slope \( \frac{2}{5} \) and \( y \)-intercept \( (0,-4) \). (Write the equation in standard form.)

Solve the following system of equations. \[ \begin{array}{r}y=-3 x+9 \\ -5 x+6 y=8\end{array} \] Give your answer as an ordered pair \( (a, b) \)

Simplify the expression: \( (x^{1/4}y^{1/2})^{8} \)

Find the equation of the line through \( (-9,-5) \) which is parallel to the line \( y=-7 x+6 \). Give your answer in the form \( y=m x+b \).

Find the value of \( x \) \( 3 x-2 y=19 \) \( 4 x-8 y=4 \)