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Karo-lina-s [1.5K]
3 years ago
6

at a local gas station, regular gasoline sells for $2.899 per gallon, while premium gasoline sells for $3.379 per gallon. how mu

ch does a person save on 15.25 gallons of gas by buying regular instead of premium?

Mathematics
2 answers:
motikmotik3 years ago
6 0
We first need to find what each type of gasoline equals at 15.25 gallons.
Regular Gasoline:
2.899•15.25
44.20975
Premium Gasoline:
3.379•15.25
51.52975
Let’s subtract regular from premium to see how much you would save.
51.52975-44.20975
7.31975
So you would save $7.31975 when buying regular gas instead of premium.
Scorpion4ik [409]3 years ago
4 0
The person saved $7.32

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\circledast \ \ f\circ f\left( x\right) = x

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Step-by-step explanation:

f(x)=\frac{5}{2x}

g(x) = 2x - 7

==============

f\circ f\left( x\right)  =\frac{5}{2\left( f\left( x\right)  \right)  }

             =\frac{5}{2\left( \frac{5}{2x}  \right)  }

             =\frac{5}{\left( \frac{5}{x}  \right)  }

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g\circ g\left( x\right)  =2(g(x)) - 7

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           = 4x - 14 - 7

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Step-by-step explanation:

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