Please answer !!! To solve the system of equations below, Luanne isolated the variable y in the first equation and then substitu

Question

3 years ago

14

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:

gladu [14] · Answer 1 · 2022-04-30T07:50:37+03:00

gladu [14]3 years ago

8 0

The answer is A apex

Law Incorporation [45] · Answer 2 · 2022-04-30T09:46:14+03:00

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.