Answer:

Step-by-step explanation:
Using the rule of exponents
=
, then
=
= 
Answer: A proportional relationship needs to pass through the origin and have a linear (straight) slope. Let me know if you need more specifics.
I am not very good you should probably ask someone else sorry
Decimal Form: 0.45
Fraction Form: 45/100 or 9/20
f(x) = 5x^2 - 4x
g(x) = 5x + 1
Therefore f - g = 5x^2 - 4x - (5x + 1)
= 5x^2 - 4x - 5x -1
= 5x^2 -9x - 1
Hope it helps :)