SOLUTION: Which of these formulas implicitly describes y as a function of x? a) 2x+y^3=100 b) 5x-|y|=10 c) x^2+y^2=25 I do not understand this.. thankyou.. Shelly

Algebra ->  Functions -> SOLUTION: Which of these formulas implicitly describes y as a function of x? a) 2x+y^3=100 b) 5x-|y|=10 c) x^2+y^2=25 I do not understand this.. thankyou.. Shelly      Log On


   



Question 140369: Which of these formulas implicitly describes y as a function of x?
a) 2x+y^3=100
b) 5x-|y|=10
c) x^2+y^2=25
I do not understand this.. thankyou.. Shelly

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Which of these formulas implicitly describes y as a function of x?
a) 2x+y^3=100
y = cube root of (-2x+100)
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b) 5x-|y|=10
Requires two equations:
y = 5x-10 or y = -5x+10
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c) x^2+y^2=25
Is not a function as there are two values of y for each value of x.
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Ans: a
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Cheers,
Stan H.