Haleysimmons30go Haleysimmons30go Math Answered hi who knows this i need helpGiven: Q = 7m + 3n, R = 11 - 2m, S = n + 5, and T = -m - 3n + 8.9th gradeSimplify Q + S - T.8m - 7n - 38m + 7n - 3-8m - 7n - 3-8m + 7n - 3