An onling seller has some items that she want to sell at a profit of \( 30 \% \) of the cost of each items the selling price ean be represe d as a Function of the cast by \( F(C)=1,20 \) whe c is the cost of an item. Find the cos of the item if cis 150 Pesos

9. Use any method to solve the system: \( \left\{\begin{array}{c}x^{2}+y^{2}=9 \\ 9 x^{2}+4 y^{2}=36\end{array}\right. \)

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?

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

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

Write the function whose graph is the graph of \( y=(x+4)^{2} \), but is reflected about the \( x \)-axis. \( y=\square \) (Simplify your answer.)