Step-by-step explanation:
for no .5.no.6...you must understand that if u want to get speed,distance must multiple with time

Here, we want to get what Andre's mistake was and correct it
To answer this, we are supposed to use the division law of indices
We have this as;

Now, in the case of this question, x is 4 and y is -3
So, we have the expression as;

His mistake is thus adding the exponents instead of subtracting
-80
hope this helps
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7 squared equals 7 times 7