Question

I'm a bit confused , can someone help me ?

Answer 1

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and since now we know that "x" is, let's do some substitution on the second equation, either will do, but we'll use the second one, and plug in that "x" value.

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recall that a solution for a system of equations is where the graphs meet, or intersect, namely where their x,y pairs equal each other.

Answer 2

`image`

and since now we know that "x" is, let's do some substitution on the second equation, either will do, but we'll use the second one, and plug in that "x" value.

`image`

recall that a solution for a system of equations is where the graphs meet, or intersect, namely where their x,y pairs equal each other.

Answer 3

the answer is c.
it isn't a because if you square root a negative number you get a positive number so it can work for the 2nd equation but not the 1st
it isn't b cause it doesn't work with either equation and it isnt d because it doesnt work with either equation as well.