First find x:
3x + 41 + x + x-8 + 2 = 100
Simplify :
5x + 35 = 100
Subtract 35 from both sides:
5x = 65
Divide both sides by 5:
X = 13
Total British stamps = x + x-8 = 13 + 13-8 = 18
Probability of being British = 18/100 = 9/50 as a fraction.
Symmetric property, I remembered the answer for this for my summer school. This is one of the equivalence properties of equality.
Answer:
54.5 
Step-by-step explanation:
divide it to one rectangle and two different triangles.
Rectangles area: (8+3)*4 = 44
triangle top: 4*3/2 = 6
triangle bottom: 3*3/2= 4.5
sum the all up: 44+6+4.5 = 54.5
don't know how to do it with π though if that's obligatory