Jonniersanchez20go Jonniersanchez20go Mathematics Answered What is the sum of the expression below? (9c – 8d) + (2c – 6) + (–d + 3) 11c + 9d – 9 11c – 9d – 3 7c – 7d – 3 7c – 9d + 3 I need help ASAP.