1. Here is information about gasoline prices at Gas Station Y and Gas Station Z.
The table shows the cost of different numbers of gallons of gasoline at Gas Station Y.
Gas Station Y
Number of Gallons Cost (dollars)
2
6 .74
5
16.85
9
30.33
At Gas Station Z, the cost of 15 gallons of gasoline is $51.30, and the cost of 8 gallons of gasoline is
$27.36.
What is the cost, in dollars per gallon, of the gasoline at the gas station with the greater cost?

is means division by fractions

step-by-step explanation:

answer: sherk

step-by-step explanation:

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x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81

i got so much points from yo a.