ElectricPavlov

I do not know what the  ⁽²⁰⁾  is  supposed to be ....

6 + 7²  = 6 + 49 = 55

The two angles with x in them are supplementary ...add to 180

7x+4  + 4x-22 = 180     then solve for x  and calculate the angles

do the same thing for the 'y' angles ....

0.75(x + 20) = 2 + 0.5(x − 2)

.75x  + 15   = 2 + .5x -1

.25x + 15 = 1

.25x = -14

x = -56

ln 5   +   ln (2x)   =  ln (5 * 2x) = ln 10x =5      e to  each side

                                       10x = e⁵

                                         x =   e⁵ /10 = .......

6^2x = 800        log both sides

2x log 6 = log 800

x = log 800 / ( 2 log 6) = .......

2x+4 > 8            or      2x+4 > -8

x > 2                            2x > -12

                                      x < -6

Graph C

common ratio ,  r = 2

Value =  1.00 (2^n-1)

I think I found it:

hr   1       2         3        4        5        6     7  

    675 + 625 + 575 + 525 + 475 +425 +375 = 3675 ft   Not quite there....add some  more hours

hr   7        8         9       10

   3675 + 325 + 275 +225 = 4500 ft

(sometimes it is just shorter to 'brute force' it !)

A      w = f * d

         w = 5 x .5 = 2.5 j

b        w = f * d

                500 * 15 = ....... j