Answer:
Step-by-step explanation:

9 + 9 = 18 + 9 = 27. 1/3 of 9 is 3 27 + 3 = 30
15 x 3 = 45. 1/3 of 15 is 5. So, 45 + 5 = 50.
The building is 50 feet tall.
Hoped this helped! :)
6 + 6 + 12 = 24, so how many atoms are in a molecule of glucose? That'd be 24.
Answer:
30x-16y+10-10x-5y+4
20x-21y14
Step-by-step explanation: