What are two decimals equivalent to 9.1

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)

Can someone explain to me how to do

One angle of a linear pair is 10 more than two-thirds the other angle. find the measure of both angles.