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If x^2 = 2y^3 and 2y = 4, what is the value of x^2 + y?

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Re: If x^2 = 2y^3 and 2y = 4, what is the value of x^2 + y?

by Brent@GMATPrepNow » Tue Aug 24, 2021 5:50 am
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Mon Aug 23, 2021 5:22 am
 GMAT Prep

If x^2 = 2y^3 and 2y = 4, what is the value of x^2 + y?

A. -14
B. -2
C. 3
D. 6
E. 18

OA E
Since we're told 2y = 4, we can conclude that y = 2

Now take the equation x^2 = 2y^3, and replace y with 2 to get: x^2 = 2(2^3)
Simplify: x^2 = 16

So, x^2 + y = 16 + 2 = 18

Answer: E
Brent Hanneson - Creator of GMATPrepNow.com
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