Answer:
a-b=12
Step-by-step explanation:
(a²-b²)/(a+b) = 12
(a-b)(a+b)/(a+b)=12
a-b=12
Sorry if my handwriting sloppy.
I showed all of it step by step.
Answer:
Step-by-step explanation:
1000*(1+8:100)^3=1000*1 ,08^3=1000*1,259712=1259,712
Answer: 25 hours
Step-by-step explanation:

8 screens
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Replace;


