In Exercises 19–30, solve each system by the addition method. 4x + 3y = 15 2x - 5y = 1

Graph each inequality. y≥log₂(x+1)

In Exercises 25–35, solve each system by the method of your choice. This is a piecewise function, refer to textbook problem.

Write the partial fraction decomposition of each rational expression. x²+2x+7/x(x − 1)²

In Exercises 19–28, solve each system by the addition method. $\(\begin{cases}\)x^2 + y^2 = 25 \\(x - 8)^2 + y^2 = 41\(\end{cases}\)$

Solve each system by the method of your choice.

$\{\begin{array}{c}5y=x^2-1\\ x-y=1\end{array}$

Solve each system in Exercises 25–26. $\(\begin{cases}\[\frac{x + 3}{2}\) - \(\frac{y - 1}{2}\) + \(\frac{z + 2}{4}\) = \(\frac{3}{2}\) \(\frac{x - 5}{2}\) + \(\frac{y + 1}{3}\) - \(\frac{z}{4}\) = - \(\frac{25}{6}\) \(\frac{x - 3}{4}\) - \(\frac{y + 1}{2}\) + \(\frac{z - 3}{2}\) = - \(\frac{5}{2}\]\end{cases}\)$