BRAINLIEST AWAITS!
solve these problems and own 15 points and brainliest!

Answer:
Step-by-step explanation:
9) a = 2 ; b = 6
a) a + b = 2 + 6 = 8
b) b - a = 6 - 2 = 4
c) ab = 2 * 6 = 12
10) c = 12 ; d = 4
a) c ÷ d = 12 ÷ 4 = 3
b) c + d = 12 + 4 = 16
c) c - d = 12 - 4 = 8