Question

Expression to represent the perimeter of a rectangle that has a length of 5x+85x+8 and a width of 10x+3

Answer 1

The perimeter is the sum of the length and the width multiplied by two, like this:
$2((5x^2+85x+8)+(10x+3))=2(5x^2+95x+11)\\=10x^2+190x+22$
$10x^2+190x+22$ is the perimeter of the rectangle.