17. a). Find \( \mathrm{A}^{-1} \),the inverse of matrix \( \mathrm{A}=\left(\begin{array}{ll}5 & 6 \\ 7 & 9\end{array}\right) \) b) Okello bought 5 physics books and 6 mathematics books for a total of Ksh 2,440 .Ali bought 7 physics books and 9 mathematics books for a total of ksh 3,560 . (i) Form a matrix equation to represent the above information. (ii) Use matrix method to find the price of a physics book and that of a mathematics book. c) A school bought 36 physics books and 50 mathematics books. A discount of \( 5 \% \) was allowed on each physics book whereas a discount of \( 8 \% \) was allowed on each mathematic book. Calculate the percentage discount in the cost of all the books bought.

Find the zeros for the polynomial function and give the multiplicity for each zero. State whether the graph crosses the \( x \)-axis or touches the \( x \)-axis and turns around at each zero. \( f(x)=x^{3}+3 x^{2}-16 x-48 \) Determine the behavior of the function at each zero. Select the correct choice below and, if necessary, fill in the answer boxes within your choice. A. The graph crosses the \( x \)-axis at \( x=\square \). The graph touches the \( x \)-axis and turns around at \( x=\square \). (Type integers or decimals. Simplify your answers. Use a comma to separate answers as needed.) B. The graph crosses the \( x \)-axis at all zeros. C. The graph touches the \( x \)-axis and turns around at all zeros.

dation \( \log _{3}(2 x-1)=3 \)

dent Name: Which graph shows the solution of \( -6(n-1)<3 \) and \( 2(n+1)>0 \) ?

1) \( \left(4 x^{2}+5\right)\left(x^{2}-2\right)\left(x^{2}+2\right)=0 \) A) \( \left\{\frac{i \sqrt{5}}{2},-\frac{i \sqrt{5}}{2}, \sqrt{2},-\sqrt{2}, i \sqrt{2},-i \sqrt{2}\right\} \) B) \( \left\{\frac{i \sqrt{10}}{2},-\frac{i \sqrt{10}}{2}, \sqrt{2},-\sqrt{2}, i \sqrt{2},-i \sqrt{2}\right\} \) C) \( \left\{\frac{i \sqrt{15}}{3},-\frac{i \sqrt{15}}{3}, i \sqrt{3},-i \sqrt{3}, i \sqrt{2},-i \sqrt{2}\right\} \) D) \( \left\{\right. \) mult. \( \left.2, \frac{i \sqrt{5}}{2},-\frac{i \sqrt{5}}{2}, \sqrt{2},-\sqrt{2}\right\} \)

dation \( \log _{3}(2 x-1)=3 \)