Answer:k=42
Step-by-step explanation:
(5k−3)(9+k)
=(5k+−3)(9+k)
=(5k)(9)+(5k)(k)+(−3)(9)+(−3)(k)
=45k+5k2−27−3k
=5z2+42z−27
=42k
Answer:
5: 3
Step-by-step explanation:
20:12
Divide each side by 4
20/4:12/4
5: 3
Answer:
8th floor
Step-by-step explanation:
10 - 6 = 4
4 + 4 = 8
I'm not quite sure, you should be able to divide the original number by 1