(10) If \( f(x)=2 x+k \) is the inverse function of \( g(x)=m x+3 \), then \( m \times k=-12 \) \( \begin{array}{llll}\text { (a) } 3 & \text { (b) } 6 & \text { (c) }-12 & \text { (d) }-3\end{array} \)

Найди значение выражения \( a+\frac{8 y-a^{2}}{a} \) при \( a=2 \) и \( y=12 \).

20. Solve the equation for \( x \). \[ \log _{x} 3=\frac{1}{2} \] \( x=9 \) (Type an integer or a simplified fraction.)

Q.24) Simplify the expression: \( 2(a-b)^{2}+3\left(a^{2}-b^{2}\right)-\left(a^{2}-2 a b+b^{2}\right) \) and find its valu when \( a=-1 \) and \( b=2 \).

3. The solution of the equation \( \left|x^{2}+1\right|\left(x^{2}+x+1\right)=0 \) is ( )

*16. Solve the equation to four decimal places. \( 2.387^{12 t}=4 \) \( t \approx 0.0131 \)