It would be 110x because they are like units, so they can be added together. Really, you are just doing 80 plus 30, and then adding an x on the end.
I think you would put 570 in the blank since 19 x 3 = 57
Area of circle
A = pi r^2
A = pi(10^2 - 6^2)
bounded by both is 36 pi
bounded by anyone is 100 pi
bounded by one only is 64 pi
Answer is: 64 PI
Hope that helps!!!
