ElectricPavlov

Note that    x+1     and    4x -56 = 180 degrees (straight line)

x+1      +     4x-56    = 180     solve for x, then calculate the values of the angles

A    assuming 30 days/month       30 days/month  x   2 kg /day   = ...........  kg/month

B     800 students    *   2kg / student-day   x 365 day/yr = ...........   kg / yr

C     14 000  kg/wk   *   1 wk/7day  *  1 student / 2 kg /day   =  ...........students

D     'The average high school student generates about 2 kg of garbage every day.'     Estimate

-4    +    1/4 ( 24- -4) = 3

In 5 minutes  there will be only 3/4 of the lawn left to mow.

Guy can mow 3/4   in 15 min     Lazar can mow 3/4 in   22.5 min

1/15   +    1/22.5    = 1/x     solve for x = 9 mins to finish the lawn

1:00 pm   + 5 min + 9 min = 1:14 PM

15 oz  @ 40%    =   .40 (15)   oz of cashews

 45 oz @ 60%    =    .60 (45)           cashews    

New total = 15 + 45 = 60 oz                  

%      =     {  .40(15) + .60(45) }  /  60    x 100% = .........

You can also solve for the RATE of the stairs, r

   then r * t    +   stairs taken = #stairs

John     15 + 12 r = #stairs

Mary       7 + 18r = # stairs

                  15 + 12r = 7+ 18r      now you can solve for r     

                                      then use r in either of the equations to calc #stairs

The screenshot says to solve by graphing:

Here is the graph.....where the graphs intersect is the points where the funtions are equal:

20 ft/ min   x 12 in/ft    /   67 in/smoot     x   60 min / 1 hr    =  

20 x 12   / 67    *   60     smoot/hr = ...........

x = original band member #

7 out of (7+1) = 7/8 x    were floutists

they lose 6       7/8x -6

and the band number is now  x -6+2  = x-4   of which 3 out of (3+1)   or  3/4 are floutists

7/8x -6 = 3/4 (x-4)   solve for x

1/8 x = 3

x = 24     original members

(6^x)³ = 6^3x = 5³

6^3x * 6² = 36*5³

6^3x+2 = 36 * 5³ = ...........