negritoboy014
20.01.2020 •
Mathematics
B9/b-3 answer with a positive exponent only
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Ответ:
b^12
Step-by-step explanation:
(b^9) / (b^-3)
exponent rule : (b^x) / (b^y) = b^(x - y)
(b^9) / (b^-3) = b^(9 - (-3) = b^(9 + 3) = b^12 <==
Ответ:
8x + 15= y
10x=y
If she has a 3 hour job, we can plug 3 in for x to find out which is better
8(3) + 15=y
24 + 15= y
39=y for a landscaping service
10(3)=y
30=y for a neighbors help
Since it will cost her 9 dollars less, she should go with the neighbor
D