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April 24, 2014

Homework Help: math

Posted by rolan on Monday, August 13, 2012 at 12:31am.

find the largest possible value of s=2x+y if x and y are side lengths in a right triangle whose hypotenuse is 5 units long.

My answer :
(5)^2 = x^2 + y^2
y^2 = 5 - x^2
y = 5-x^2

Substituting y to s,

S = 2x + y = 2x + 5-x^2

To find the largest possible value,
ds/dt = .? I confuse to complete this, please help me

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