Asked by Craig

Find
dy/dt
when
y = 2x2 + 2x + 4
and
dx/dt = 14
when
x = 7.
Answered by Craig
FORMAT WRONG ABOVE....
Correct one is..

Find
dy/dt
when
y = 2x^2 + 2x + 4
and
dx/dt = 14
when
x = 7.
Answered by Steve
just use the chain rule. Since x and y are both functions of t,

dy/dt = (4x+2) dx/dt

Now just plug in your numbers
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