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A(5, w^3) is the (x, y) coordinate of point located on the parabola Y

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Bunuel
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A(5, w^3) is the (x, y) coordinate of point located on the parabola Y [#permalink] New post   21 Jun 2016, 02:46
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A(5, w^3) is the (x, y) coordinate of point located on the parabola Y = X^2 + 2. What is the value of w?

A. 3.
B. 4.
C. 5.
D. 6.
E. 9.
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Re: A(5, w^3) is the (x, y) coordinate of point located on the parabola Y [#permalink] New post   21 Jun 2016, 05:10
substitute the value
we then have
y=27=w^3
w=3
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Re: A(5, w^3) is the (x, y) coordinate of point located on the parabola Y [#permalink] New post   21 Jun 2016, 05:38
y=x^2 +2
w^3=5^2+2
w^3=27
W=3
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Re: A(5, w^3) is the (x, y) coordinate of point located on the parabola Y [#permalink] New post   21 Jun 2016, 09:26
Bunuel wrote:
A(5, w^3) is the (x, y) coordinate of point located on the parabola Y = X^2 + 2. What is the value of w?

A. 3.
B. 4.
C. 5.
D. 6.
E. 9.


Y = X^2 + 2

X= 5

Y = 5^2+2= 27

Y is in the form w^3

w^3=27

w=3
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Re: A(5, w^3) is the (x, y) coordinate of point located on the parabola Y [#permalink] New post   26 Feb 2017, 00:11
Bunuel wrote:
A(5, w^3) is the (x, y) coordinate of point located on the parabola Y = X^2 + 2. What is the value of w?

A. 3.
B. 4.
C. 5.
D. 6.
E. 9.


As point A is a point on the parabola, it must satisfy the equation.
Substitute 5 in place of x and w^3 in place of y :

w^3 = (5^2) + 2 = 27
=> w = 3
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Re: A(5, w^3) is the (x, y) coordinate of point located on the parabola Y [#permalink]
26 Feb 2017, 00:11
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