Count the squares in between each letter.
Point Q is 6 units from Point R
Point R is 7 units from Point T
Point T is 3 units from Point S
For the area, it is easiest to take the area of each of those shapes and then add them.
(3*7/2) + (6*7)
10.5 + 42 = 52.5 Square Units
50 =2×5×5
125=5×5×5
Hoghest common factor = 5×5
=25
Let the average cost of car in 2009 be $x, then the average cost of a car in 2013 is 2x - 5
25,000 = 2x - 5
2x = 25,000 + 5 = 25,005
x = 25,005/2 = $12,502.50