Answer:
Step-by-step explanation:
If
, then 
Now, puting
value in the other equation, we have

Therefore, is a cubic equation
Answer:
39999500 pennies
Step-by-step explanation:
5^b = (5^3)(5^9)
5^b = 5^12
b=12
This doesn’t have any options to choose from but factors of -30 that have a difference if 13 would be 15 and -2.