SOLUTION: (8) Question: Choose the nonlinear systesm below that have (x,y)=(4,3) as on of their solutions. (A) x^2+y^2=25 x+y=7 (B) y=x^2+2x-21 x-y+1 (C) x^2-y^2=7 2x+7=0 (

Question 30459: (8) Question: Choose the nonlinear systesm below that have (x,y)=(4,3) as on of their solutions.
(A) x^2+y^2=25
x+y=7
(B) y=x^2+2x-21
x-y+1
(C) x^2-y^2=7
2x+7=0
(D) both a and b
(E) both b and c
Please be specific as to which letter answer is correct.
Answer by venugopalramana(3286) (Show Source): You can put this solution on YOUR website!
(8) Question: Choose the nonlinear systesm below that have (x,y)=(4,3) as on of their solutions.
SUBSTITUTE X=4 AND Y=3 AND CHECK......
(A) x^2+y^2=25...........4^2+3^2=16+9=25..OK
x+y=7....4+3=7...OK..
(B) y=x^2+2x-21.......3=4^2+2*4-21=16+8-21=3...OK
x-y+1..DO YOU MEAN X-Y=1...IF SO ....4-3=1....OK
(C) x^2-y^2=7...........4^2-3^2=16-9=7...OK
2x+7=0.....2*4+7=8+7=15....NOT CORRECT.....
(D) both a and b..........OK...................
(E) both b and c ..........NOT OK............
Please be specific as to which letter answer is correct.
SUBJECT TO ABOVE CORRECTION D IS CORRECT
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