Please answer !!! To solve the system of equations below, Luanne isolated the variable y in the first equation and then substitu
ted it into the second equation what was the resulting equation ?
{2y=6x
{x²+y²=49
A. x²+9x²=49
B. x²+9x=49
C. x²+3x=49
D. x²+3x²=49
2 answers:
Answer:
Option A. x² + 9x² = 49
Step-by-step explanation:
Luanne used two equations given as 2y = 6x ------(1)
and x² + y² = 49 -----(2)
Luanne isolated the value of y from the equation 1 and then substituted in equation 2.
We will do the same.
from equation 1
2y = 6x
⇒ y = 3x
Now we plug in the value of y in equation 2.
x² + (3x)² = 49
x² + 9x² = 49
which matches the option A.
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