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Robert A.'s Resources

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So why did you post the same thing twice in 25 minutes????? That's a no-no on bulletin boards.   This is a physics problem. But if you want to solve it like it was a math problem - okay.   1st you can find the x-axis of symmetry.  x= -b/2aThen you can find ...

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For a polynomial of form  Ax^2 + Bx + C = 0 A tells the end behavior.  Negative says it opens down, the end behavior is down on both left and right. The axis of symmetry is given by x = -b/2a Find -b/2a, that is the ex value for the vertex. Plug that value into...

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d/dx(x^(1/x))   Express x^(1/x) as a power of e      x^(1/x) = e^(log(x^(1/x))) = e^((log(x))/x)      = d/dx(e^((log(x))/x)) Using the chain rule     d/dx(e^((log(x))/x)) = ( de^u)/( du) ( du)/( dx)   ...

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d/dx (log(4) x e^x) Factor out constants:      = log(4) (d/dx(e^x x)) Use the product rule,      d/dx(u v) = v ( du)/( dx) + u ( dv)/( dx),      where u = e^x and v = x:      =...

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You have a quadratic in the form of: y = (x-h)^2 + k   1) The vertex is (h,k) or (2,-1) 2) The axis of symmetry is x=h  (or x=2) 3) The a=1/2 widens the parabola and is + so the graph opens up The h = +2 shifts the parabola 2 to the right of the y axis The...

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Write two equations.   the difference of the two numbers is 17 X - Y = 17   the larger is twice the smaller decreased by 13 X = 2 ·Y - 13   Now solve the simultaneous equations by any method, substitution or by elimination.

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For a parabola in the form y = A(x-h)2 + k  the vertex is (h,k)SO   1) Rewrite the equation in that form. OR Using the x axis of symmetry is -(b/2a)   find x then substitute that into the equation   to get the y value.   x = -(b/2a)...

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You gave the method to the solution in your question. Solve by substituting y=3x+4  INTO 7x+2y=21   7x+2y=21 becomes 7x+2(3x+4)=21 distribute 7x+6x+8=21 now solve for x

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This problem (a physics problem) requires a little more than just being able to solve a simple math formula. You need to understand what is going on well enough see that if one is going X speed and the other is going Y speed then they are traveling towards each other at a speed of X+Y...

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