ElectricPavlov

point - slope form

y - - 2  = 7 ( x- -3)    re-arrange to slope intercept form

y = 7x +19

janine = x      Ingrid = x+ 2  

x/7   + ( x+2)/3   = 14      multiply through y 21

3x    + 7 (x+2) =  294

10x = 280

x = janine = 28 y/o     ingrid = 30 y/o

https://web2.0calc.com/questions/hyperbola-help_1

https://web2.0calc.com/questions/halp-5th-or-6th-repost-lost-track-lol#r2

Don't know how it was derived....here is a graph:

https://www.desmos.com/calculator/sb0brydioy

First you will need to use law of cosines t o fine the length of side a    ( do you know how to do that?)

 a^2 = b^2 + c^2 - 2(b)(c)cos 79

  do that first then use Heron's formula

Step 1: Calculate "s" (half of the triangles perimeter):

s = (a+b+c)/2

Step 2: Then calculate the Area:    Area = sqrt [   s  (s-a)(s-b)(s-c) ]

eight sided polygon sum of interior angles =   ( 8-2)(180) = 1080 degrees

   130    +    101    +    x+26   ......   + 151 = 1080     solve for x

Still working on this.....   x = 16 ?

x * x * x = 342

3x*3x*3x = 27 x*x*x      second cube is 27 times first cube   difference is  26 times first cube = 26 * 343 = 8918 cm3

10 c 4 =   10! / (4! 6!) = 210

9 c3 = 9! / (3! 6!) = 84

9 c 4 = 9!/ ( 4! 5!) = 126       126 + 84 = 210