Because if Ike is 5 years older than his brother and Ike's age is represented by the x and his brother the 5, then it would be Ike minus his brothers age.
Let the length of the original hexagon be x: the perimeter of the hexagon will be: P=length*number of sides P=6*x=6x After the dilation the new length became: length=scale factor × original length =75 × x =75x thus the new perimeter will be: 6×75x =450x hence the new perimeter compared to the old one will be: 450x/6x =75 the new perimeter is 75 times the old one
