A rectangular room is \( 2 \) times as long as it is wide, and its perimeter is \( 42 \) meters. Find the dimension of the room. The length is : \( 14 \) meters and the width is \( 7 \) meters. 

A factor of \( x^{3}-1 \) is \( \begin{array}{ll}\text { (a) } x-1 & \text { (b) } x+1 \\ \text { (c) } x^{2}+x+1 & \text { (d) Both (a) \& (c) }\end{array} \)

II. \( (3+c)^{2} \)

A number \( P \) varies directly as \( q \) and partly inversety as \( q^{2} \). Given that \( P=11 \) when \( q=2 \) and \( P=25.16 \) when \( q=5 \), calculate the value of \( P \) when \( q=7 \).

При каком значение х график функции \( f(x)=\log _{3}(x-9) \) проходит через точку \( (x ; 3) ? \)

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