5d-2g=9 solve for g solve the literal equation

Δabc is dilated by a scale factor of 3 with the origin as the center of dilation to form δa′b′c′. the slope of is -1.2. the length of is p units, the length of is q units, and the length of is r units. the slope of is . the length of is units.

Me n o w. i need t h i s. 10 points

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)