Answer:
40,000,000 or 40 million
Step-by-step explanation:
In order to solve a proportion you need to cross multiply, so you would do:
4x20 and 9xX and you would get...
9x=80
then divide by nine to get
x=8.8888888889
which is technically 8.9
Answer: -4
Step-by-step explanation: -4/4 = -1
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9y^3-y^2 is a required answer