David needs to fence his country house block to keep his dog in. The block is a rectangle with length 30 m and breadth 25 m . Fencing costs \( \$ 12 \) per metre. What will be he total cost of fencing?

7. A village with an actual area of \( 1 \mathrm{~km}^{2} \) is represented by an area of \( 4 \mathrm{~cm}^{2} \) on a map. (a) Express the scale of this map in the form \( 1: n \), where \( n \) is an integer.

Si \( P=(1,-1) \) y \( Q=(\sqrt{2},-1) \), la magnitud del vector \( \overrightarrow{P Q} \) es

Draw a graph of the line that contains the given point and has the given slope. \( (0,1) ; m=-3 \)

Draw a graph of the line that contains the given point and has the given slope. \( (-5,0) ; m=\frac{1}{5} \)

coordinate grid below. Find the coordinates of a fourth point o that the four points form the vertice of a rectangle.