Read the following description of a relationship: An electronics store has 18 permanent employees who work all year. The store also hires some temporary employees to work during the busy holiday shopping season. Let a represent the number of temporary employees and \( b \) represent the total number of employees during the holiday shopping season.

76. Решите графически систему линейных уравнений: \( \begin{array}{ll}\text { а) }\left\{\begin{array}{l}x-y=1, \\ x+3 y=9 ;\end{array}\right. & \text { в) }\left\{\begin{array}{l}x+y=0, \\ -3 x+4 y=14 ;\end{array}\right. \\ \text { б) }\left\{\begin{array}{ll}x+2 y=4, \\ -2 x+5 y=10 ; & \text { г) }\left\{\begin{array}{l}3 x-2 y=6, \\ 3 x+10 y=-12\end{array}\right.\end{array}\right.\end{array} \).

Find the factar of \( x^{5}+x^{4}-13 x^{3}-13 x^{2}+36 x+36 \) ai list three factars.

7. Show that the set F of the six complex valued functions: \( f_{1}(z)=z, f_{2}(z)=\frac{1}{1-z}, f_{3}(z)=\frac{z-1}{z} \) \( f_{4}(z)=\frac{1}{z}, f_{5}(z)=1-z, f_{6}(z)=\frac{z}{z-1} \) is a group under the usual multiplication of mappings.

If a function \( f(x) = 3x + 2 \), what is its inverse function?

\( 6 x^{3}-5 x^{7}+6 \) leading term? Leading cafficient? Turning Caint?