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## Farid S.'s Resources

Complementary angles mean that the two angles, when added together, equal 90°.   Let's call the first angle x, and its second, complementary angle 2x.  So, we have x + 2x = 90.   Solving for x, we get x = 30.   Since the first angle was called x, that...

Quotient rule: "low d'high - high d'low, square the denominator and away we go"   This essentially means "[ (bottom function)*(derivative of the top function) - (top function)*(derivative of the bottom function) ] / (bottom function)2   Applying the quotient...

You have to use the quadratic equation to solve this problem.   The general formula for the quadratic equation is x = {-b +- sqrt [ b2 - 4(a)(c) ]} / (2a)   Applying this formula to this problem, we get: {-(-7) +- sqrt [ (-7)2 - 4(2)(4) ]} / (2a)   From...

Maybe it's just my end, but I don't see the expression.

Hi John,   To solve this problem, first thing you'll want to do is multiply out the first set of parenthesis.  So, you want to multiply (5x-2) times (x2-x3).  This gives 5x3 - 5x4 - 2x2 + 2x3 = -5x4 + 7x3 - 2x2    Now, take (-5x4 + 7x3 -...

This is actually pretty straight forward.  Just multiply 3 all the way through.   So, we get 6x^2 + 18x + 9.

Awesome, thanks for posting an example.   So in this problem, we want to replace the x in f(x) with h(x).  That would give us f(12/x).  So in the function for f(x), where there is an x, we replace it with (12/x).   So, f(h(x)) becomes f(12/x) = (12/x)^2 +...

Hi,   Well, unless you have a specific example to work with, I may not be able to guide you to understanding how to use functions in a graph or a table.  I think those are best understood with examples.   Domain is all the possible values that x can take on.  Range...

Hi Theresa,   Circumference =  2*pi*r and area = pi*r*r.   So, the circumference would be 2*pi*11cm = 22pi cm.   Furthermore, the area would be pi*11cm*11cm = 121pi cm2   Hope this helps.

Hi Dalia,   To find the inverse of the function the first step is to solve for t.  To do this, get t by itself.   We get √(3t) = y - 2.   Squaring both sides, we get 3t = y2 - 4y + 4.   Dividing both sides by 3, we get t =...