15) 15} {x + 8y 2 ? I"): + 9y 2 49 A) no solution B) (7, 1) C) (10} D) all ordered pairs that solve x + By 2 ? 1?) 1?} 8x + y = 9 4CIx 5y 2 =15 A) all ordered pairs that solve 8x + y = 9 B) (0, 9} C) [8, 0} D) no solution 18) 18} x 4y 2 3 4x 1b\"): = 4 A) no solution B) all ordered pairs that solve x 4y : 3 C) [3, 0} D) [0, %]