Expression 4: left parenthesis, "x" minus 8 , right parenthesis squared plus "y" squared less than or equal to 36 left brace, left parenthesis, "x" minus 8 , right parenthesis squared plus "y" squared greater than or equal to 25 , right brace left brace, "y" greater than or equal to 0 , right brace left brace, "x" less than or equal to 8 , right bracex−82+y2≤36x−82+y2≥25y≥0x≤8
4
Expression 5: left parenthesis, "x" minus 8 , right parenthesis squared plus "y" squared less than or equal to 25 left brace, left parenthesis, "x" minus 8 , right parenthesis squared plus "y" squared greater than or equal to 16 , right brace left brace, "y" greater than or equal to 0 , right brace left brace, "x" less than or equal to 8 , right bracex−82+y2≤25x−82+y2≥16y≥0x≤8
5
Expression 6: left parenthesis, "x" minus 8 , right parenthesis squared plus "y" squared less than or equal to 16 left brace, left parenthesis, "x" minus 8 , right parenthesis squared plus "y" squared greater than or equal to 9 , right brace left brace, "y" greater than or equal to 0 , right brace left brace, "x" less than or equal to 8 , right bracex−82+y2≤16x−82+y2≥9y≥0x≤8
6
Expression 7: left parenthesis, "x" minus 8 , right parenthesis squared plus "y" squared less than or equal to 9 left brace, left parenthesis, "x" minus 8 , right parenthesis squared plus "y" squared greater than or equal to 4 , right brace left brace, "y" greater than or equal to 0 , right brace left brace, "x" less than or equal to 8 , right bracex−82+y2≤9x−82+y2≥4y≥0x≤8