15(b). Two years ago, a man was five times as old as his grandson. Two years later, his age will be 12 more than three times the age of the grandson. The present age of the grandson is: \( \begin{array}{lll}\text { 1) } 15 \text { years } & \text { 2) } 12 \text { years } & \text { 3) } 14 \text { years }\end{array} \quad \) 4) 6 years

What should be, subtracted from \( 8 x-3 y+4 \) to get \( 3 x-2 y+4 \).

O Functions and Lines Evaluating functions: Linear and quadratic or cubic The functions \( f \) and \( g \) are defined as follows. \[ f(x)=-2 x^{2}-3 \quad g(x)=3 x-1 \] Find \( f(5) \) and \( g(-2) \). Simplify your answers as much as possible. \[ f(5)=\square \] \( g(-2)=\square \)

Evaluating functions: Linear and quadratic or cubic The functions \( f \) and \( g \) are defined as follows. \( f(x)=3 x^{3}+5 \quad g(x)=-5 x+4 \) Find \( f(-2) \) and \( g(7) \). \[ f(-2)=\square \] \( g(7)=\square \)

зАданив №2 Дополните выражение до полного квадрата разности и запишите получившийся квадрат разности: \( \quad l^{2}-14 l+()^{2}=( \)

What is the value of one third the determinant of \( \left[\begin{array}{cccc}2 & 3 & 0 & 11 \\ 3 & 5 & -1 & 10 \\ 0 & -6 & 2 & 4 \\ 2 & 4 & 7 & -5\end{array}\right] \) ?