briiiiiiiii2541 briiiiiiiii2541 01-06-2023 Mathematics contestada pls quick. All multiple choice wuestions pls. Knowledge/Understanding Multiple Choice: 18 Marks] 1. Determine a - b given thata = (2,-7) and b = (-3,6) a)-36 b)-48 c) 48 2. 3(2-30)-2(D-Su) -40 simplified is: a) 16ü - 150 b) 4u - 30 c) -3u - 60 3