Question

v (x)=12-2x-5x when x =-2, 0 and 5

Answer 1

$v(x)=12-2x-5x$

You can simplify the equation:

$v(x)=12-7x$

To find the solution in a value of x you substitute the x by the given value:

x=-2

$\begin{gathered} v(-2)=12-7(-2) \\ v(-2)=12+14 \\ v(-2)=26 \end{gathered}$

x=0

$\begin{gathered} v(0)=12-7(0) \\ v(0)=12 \end{gathered}$

x=5

$\begin{gathered} v(5)=12-7(5) \\ v(5)=12-35 \\ v(5)=-23 \end{gathered}$