ElectricPavlov

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                        a^2       +4     - 17/(a+2)    

a+2  |    a^3 +2a^2 +4a -9

             a^3 +2a^2

________________________

            0     +0        +4a-9

                                 4a+8

_________________________

                                  0 -17 R

2 Graph 

1  What do you SEE as the lowest point on the graph???    Y=

2 

3  REFLECTING across the x axis means multiplying by -1      -cos x

      shifting it 2 units DOWN means subtracting 2     

              -cos (x) -2

1  Amp = 3/4   from the equation

2 Midline of cos is USUALLY at y = 0    this one is shifted UP by 5

3 frequency =  2/2pi = 1/pi

4 the wave takes 8pi to make one complete up and down cycle    period = 8pi

First and Second one graphs

Third One   Multiplying by 2 makes the wave TALLER....vertically stretched  by 2

                    Adding 3   shifts it UP 3 units

Second One

The high and low of the ferris wheel describe the DIAMETER

    High 55   Low 5       Diameter  50   radius 25 yds

Low point 5 (assumed to be ground level)  High point  55      50 yds  above the ground

Low point 9s    next low point  21 sec       takes 12 seconds for one rev

At t= 0   according to the table   ferris wheel height is 30 yds     Low point is at t=9s  5 yds

First one    See :  https://web2.0calc.com/questions/check-my-answer-please_1

3 C   take away 5 C

3-5 = -2 C