Define your variable, write an equation or inequality, and solve. Pet supplies make a profit of \( \$ 5.50 \) per bag on its line of natural dog food. If the store wants to make a profit of no less thgn \( \$ 5,225 \), how many bags of dog food does it need to sell?

\( 19 j-86 \geq 5 \) or \( 27 j-82 \leq 18 \)

If \( f(x)=\left\{\begin{array}{ll}2 x-5 & \text { if }-2 \leq x \leq 4 \\ x^{3}-4 & \text { if } 4<x \leq 5\end{array}\right. \), find: (a) \( f(0) \), (b) \( f(1),(c) f(4) \), and \( (d) f(5) \). (a) \( f(0)=\square \) (b) \( f(1)=\square \) (c) \( f(4)=\square \) (d) \( f(5)=\square \)

Solve for \( r \). \( 3^{r}+3^{3-r}=28 \)

3. \( 3 x(4 x-5) \)

10. The perimeter of a rectangular plot of land is 72 meters and its area is \( 308 \mathrm{~m}^{2} \). What are the dimensions of the property?