Answer:
7z + 84
Step-by-step explanation:
Multiply 7 times z and 12
3/5 both 12 and 20 can both be divided by 4
Answer:

Step-by-step explanation:
From law of indices
Answer:
mhmmm well i don't know what you got wrong but it was prob cus u didnt sum wrong or wasn't paying attention to what you were doing. Hope this helpss have a safe and joyful holiday
Step-by-step explanation: