Verified answer

Bonsoir,

A = 1/3 + 5/4

A = (1 x 4) / (3 x 4) + (5 x 3) / (4 x 3)

A = 4/12 + 15/12

A = 19/12

B = 15/28 x 7/25 x 1/6

B = 105/700 x 1/6

B = 105/4 200

B = (105 x 1) / (105 x 40)

B = 1/40

C = 24/7 - (- 12)

C = 24/7 + (12 x 7) / (1 x 7)

C = 24/7 + 84/7

C = 108/7