A long distance phone company charges $1.01 for the first 25 minutes, and then $.09 for each additional minute. If it cost $9.56
1 answer:
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First of all, you have to manipulate the equation into the standard
form. You can simplify the 1's on both sides and you have
This means that your coefficients are
And since the solving formula is
Plugging your values yields
The resulting equation if Becca isolated x² in the first equation and then substituted it into the second equation is (9-y²) / 25 - y²/36 = 1
<h3>Equation</h3>x² + y² = 9
x²/25 - y²/36 = 1
From (1)
x² = 9 - y²
substitute x² = 9 - y² into (2)
x²/25 - y²/36 = 1
(9-y²) / 25 - y²/36 = 1
Therefore, the resulting equation is option C; (9-y²) / 25 - y²/36 = 1
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