ElectricPavlov

Doubling the recipe calls for doubling the amount of flour

3 1/4   x   2 = ........ cups

- x^2 -x + 3    = 2x^2 -1      re-arrange

0 = 3x^2 +x-4             use quadratic formula to find the x values where the graphs intersect

                                           a = 3     b   = 1      c = -4

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)

                                          use the x values in the equations to calculate the corresponding 'y' values

(actually....you will only need the 'x' values  which will be   c    and a  )

                                                ...then you can answer the rest of the question

Missing info .....  

"The elevation of city D is ??  of the elevation of city C."

.25   +   .30    +  .75     -         .20        =    amount in the jar

34xy/x    -47      the x's will 'cancel each other'

34y  - 47

80 out of 360  of the total area of the circle is 48 pi

80/360 pi r^2 = 48 pi

r^2 = 48 (360/80)                   I think you can finish !

Use quadratic formula

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)            a = 2     b = -6     c = 7       to find the   m +- ni    solutions, then find  m*n 

The largest is   6   out of ( 1+2+3+6)   =    6 / 12   of the entire 360^o of the entire circle ...

    6/12 x 360 = 180 degrees

You're welcome ! 

Hour hand starts at 60 degrees and moves 1/2 degree per minute  1/120 degree per sec

  minute hand moves 1/10 degree per second

60 + 1/120 x    =   1/10 x  -180  

240 + 1/120 x = 1/10 x 

240 = 1/10 x - 1/120 x

240 =  12/120 x = 1/120 x

240 = 11/120 x

x = 2618.18 seconds after 2 o'clock

minute hand will be at   43.63 minutes  =  43:38

  ~ 2 : 43 : 38