Answer:
Step-by-step explanation:9m -3m +2n = 6m+2n
area of the ceiling = 55 x 55 = 3025 square feet
3025/275 = 11 cans
(-1,-9) because if we substituted 1 into x y would be 9 and if we substituted 1/2 into x y would be 3 but if we substituted -1 into x y would be 1/9 so therefore that value is incorrect
BDE are the correct options
