ElectricPavlov

Rows x columns

    2     x    3

Assuming two numbers:

5 x 8 = 40

5 + 8 = 13

Three numbers    5 x 4 x 2         11     (?)

x = slower car  time                x+4 = faster car time

120 (x+4) = 2 (90) x

120x + 480 = 180 x

x = 8 hours        8hours at 90 k/hr = 720 km

Work = F x d      F = ma

W = (.018 kg)(9.81 m/s^2) x .05 m =.............. joules

First one (thers are similar)

5 + 2x = 25     subtract 5 from both sides of the equation to get

2x = 20            now divide both sides by to to get

x = 10 

CHECK:    5 + 2(10) = 25

                  5 + 20 = 25

                       25   = 25     !   Verified !  

You can do the others....

For this quadratic equation, max will occur at t = - b/2a   where a = -16   and b = 576

x³ = 6 x²

^{then   x = 6}          

The interior angles of a triangle sum to 180 degrees

soooo      x      +   5x    +   4x-2     = 180       solve for 'x'  then calculate the angles

14000 / (7*2) = 1000 students

14000 / 7 =  kg  per day = 2000 kg per day

2000 kg / day      /   2kg/ student-day = 1000 students  = 1000 students

volume = x * x *x = x³

x³ = 73   cm³

x = 4.179339

S.A. =   6 *  (x²) = 104.8  cm³